diff --git a/Geometry/CMSCommonData/data/materials/2024/v1/materials.xml b/Geometry/CMSCommonData/data/materials/2021/v4/materials.xml
similarity index 95%
rename from Geometry/CMSCommonData/data/materials/2024/v1/materials.xml
rename to Geometry/CMSCommonData/data/materials/2021/v4/materials.xml
index 5a09e02686524..0cae172e93e86 100644
--- a/Geometry/CMSCommonData/data/materials/2024/v1/materials.xml
+++ b/Geometry/CMSCommonData/data/materials/2021/v4/materials.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0"?>
-<DDDefinition xmlns="http://www.cern.ch/cms/DDL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.cern.ch/cms/DDL ../../../DetectorDescription/Schema/DDLSchema.xsd">
+<DDDefinition>
+
  <MaterialSection label="materials.xml">
   <ElementaryMaterial name="Aluminium" density="2.699*g/cm3" symbol=" " atomicWeight="26.982*g/mole" atomicNumber="13"/>
   <ElementaryMaterial name="Antimony" density="6.691*g/cm3" symbol=" " atomicWeight="121.76*g/mole" atomicNumber="51"/>
@@ -71,70 +72,6 @@
   <ElementaryMaterial name="Yttrium" density="4.469*g/cm3" symbol=" " atomicWeight="88.906*g/mole" atomicNumber="39"/>
   <ElementaryMaterial name="Zinc" density="7.133*g/cm3" symbol=" " atomicWeight="65.38*g/mole" atomicNumber="30"/>
   <ElementaryMaterial name="Zirconium" density="6.506*g/cm3" symbol=" " atomicWeight="91.224*g/mole" atomicNumber="40"/>
-  <CompositeMaterial name="FPix_Thermflow" density="0.7625*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="0.3787448">
-    <rMaterial name="materials:Silicon"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.21575329">
-    <rMaterial name="materials:Oxygen"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.3239468">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.08155498">
-    <rMaterial name="materials:Hydrogen"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="FPix_TPG" density="2.47*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="1.00">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="FPix_CFSkin" density="3.43511*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="1.00">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="FPix_CFSkin_OuterOuterRing" density="2.2677*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="1.00">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="FPix_CFSkin_OuterInnerRing" density="1.000035*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="1.00">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="FPix_CFSkin_InnerOuterRing" density="1.77*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="1.00">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="FPix_CFSkin_InnerInnerRing" density="1.1744*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="1.00">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="C_C_OuterOuterRing" density="1.612*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="1.0">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="C_C_OuterInnerRing" density="1.745*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="1.0">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="C_C_InnerOuterRing" density="1.944*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="1.0">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="C_C_InnerInnerRing" density="1.566*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="1.0">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-  </CompositeMaterial>
   <CompositeMaterial name="80pct Argon plus 20pct CO_2" density="1.675*mg/cm3" symbol=" " method="mixture by weight">
    <MaterialFraction fraction="0.78405896">
     <rMaterial name="materials:Argon"/>
@@ -205,20 +142,6 @@
     <rMaterial name="materials:Iron"/>
    </MaterialFraction>
   </CompositeMaterial>
-  <CompositeMaterial name="Bpix_Pipe_Steel" density="8.02*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="0.0005">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.18">
-    <rMaterial name="materials:Chromium"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.1">
-    <rMaterial name="materials:Nickel"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.7195">
-    <rMaterial name="materials:Iron"/>
-   </MaterialFraction>
-  </CompositeMaterial>
   <CompositeMaterial name="Water" density="1*g/cm3" symbol=" " method="mixture by weight">
    <MaterialFraction fraction="0.11190083">
     <rMaterial name="materials:Hydrogen"/>
@@ -1155,13 +1078,6 @@
     <rMaterial name="materials:Carbon fibre str."/>
    </MaterialFraction>
   </CompositeMaterial>
-  <!-- Phase1 BPIX CFStrip material as defined by W. Bertl-->
-  <CompositeMaterial name="CFK" density="1.575*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="1.00000000">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-
   <CompositeMaterial name="Carbon_fibre_str_Upgrade" density="0.293*g/cm3" symbol=" " method="mixture by weight">
    <MaterialFraction fraction="1.00000000">
     <rMaterial name="materials:Carbon fibre str."/>
@@ -2357,20 +2273,6 @@
     <rMaterial name="materials:Bor 11"/>
    </MaterialFraction>
   </CompositeMaterial>
-  <CompositeMaterial name="MB4ShieldsBoronPolyethylUH050" density="1.005*g/cm3 " symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="0.8322">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.1178">
-    <rMaterial name="materials:Hydrogen"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.00995">
-    <rMaterial name="materials:Bor 10"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.04005">
-    <rMaterial name="materials:Bor 11"/>
-   </MaterialFraction>
-  </CompositeMaterial>
   <CompositeMaterial name="AntiLead" density="11.16*g/cm3 " symbol=" " method="mixture by weight">
    <MaterialFraction fraction="0.96">
     <rMaterial name="materials:Lead"/>
@@ -2452,57 +2354,6 @@
     <rMaterial name="materials:Silicon"/>
    </MaterialFraction>
   </CompositeMaterial>
-  <CompositeMaterial name="MS_Al36" density="1.403*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="0.379586">
-    <rMaterial name="materials:Aluminium"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.27524785">
-    <rMaterial name="materials:Copper"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.26823734">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.045019923">
-    <rMaterial name="materials:Hydrogen"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.03190889">
-    <rMaterial name="materials:Silver"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="MS_Al48" density="1.373*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="0.40684004">
-    <rMaterial name="materials:Aluminium"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.25552552">
-    <rMaterial name="materials:Copper"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.26144891">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.043880579">
-    <rMaterial name="materials:Hydrogen"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.032304952">
-    <rMaterial name="materials:Silver"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="MS_Al60" density="971*mg/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="0.43940244">
-    <rMaterial name="materials:Aluminium"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.22781143">
-    <rMaterial name="materials:Copper"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.25517545">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.042827665">
-    <rMaterial name="materials:Hydrogen"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.034783015">
-    <rMaterial name="materials:Silver"/>
-   </MaterialFraction>
-  </CompositeMaterial>
   <CompositeMaterial name="MS_Al_cable" density="1.95062*g/cm3" symbol=" " method="mixture by weight">
    <MaterialFraction fraction="0.69471035">
     <rMaterial name="materials:Aluminium"/>
@@ -3893,17 +3744,6 @@
     <rMaterial name="materials:Hydrogen"/>
    </MaterialFraction>
   </CompositeMaterial>
-  <CompositeMaterial name="T_Kapton" density="1.4*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="0.59985105">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.080541353">
-    <rMaterial name="materials:Hydrogen"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.31960759">
-    <rMaterial name="materials:Oxygen"/>
-   </MaterialFraction>
-  </CompositeMaterial>
   <CompositeMaterial name="T_MSGC-Average" density="230*mg/cm3" symbol=" " method="mixture by weight">
    <MaterialFraction fraction="0.8">
     <rMaterial name="materials:Carbon"/>
@@ -3952,68 +3792,6 @@
     <rMaterial name="materials:Argon"/>
    </MaterialFraction>
   </CompositeMaterial>
-  <CompositeMaterial name="T_Pix_Bar_Det" density="2.33*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="1.00000000">
-    <rMaterial name="materials:Silicon"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="T_Pix_Bar_Hybrid" density="3.918*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="0.12227401">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.020384302">
-    <rMaterial name="materials:Hydrogen"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.23710889">
-    <rMaterial name="materials:Oxygen"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.24417229">
-    <rMaterial name="materials:Copper"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.17802235">
-    <rMaterial name="materials:Silicon"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.19803815">
-    <rMaterial name="materials:Aluminium"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="T_Pix_Bar_Readout" density="2.33*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="1.00000000">
-    <rMaterial name="materials:Silicon"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="T_Pix_Fwd_Det" density="2.33*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="1.00000000">
-    <rMaterial name="materials:Silicon"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="T_Pix_Fwd_Readout" density="2.17525*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="0.84842968">
-    <rMaterial name="materials:Silicon"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.063360581">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.015596821">
-    <rMaterial name="materials:Hydrogen"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.039385794">
-    <rMaterial name="materials:Oxygen"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.033227128">
-    <rMaterial name="materials:Indium"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="T_Silicon" density="2.33*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="1.00000000">
-    <rMaterial name="materials:Silicon"/>
-   </MaterialFraction>
-  </CompositeMaterial>
-  <CompositeMaterial name="T_Silicon Detector" density="2.33*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="1.00000000">
-    <rMaterial name="materials:Silicon"/>
-   </MaterialFraction>
-  </CompositeMaterial>
   <CompositeMaterial name="Teflon" density="2.2*g/cm3" symbol=" " method="mixture by weight">
    <MaterialFraction fraction="0.24018637">
     <rMaterial name="materials:Carbon"/>
@@ -4404,14 +4182,6 @@
     <rMaterial name="materials:Vcal CO2"/>
    </MaterialFraction>
   </CompositeMaterial>
-  <CompositeMaterial name="Bpix_CO2_-20C" density="1.0327*g/cm3" symbol=" " method="mixture by weight">
-   <MaterialFraction fraction="0.27292145">
-    <rMaterial name="materials:Carbon"/>
-   </MaterialFraction>
-   <MaterialFraction fraction="0.72707855">
-    <rMaterial name="materials:Oxygen"/>
-   </MaterialFraction>
-  </CompositeMaterial>  
   <!-- Tracker Cooling Fluids END -->
   <!-- CASTOR materials -->
   <CompositeMaterial name="Castor_QuartzFibers/Air_mx" density="2.1743080*g/cm3" symbol=" " method="mixture by weight">
@@ -4631,5 +4401,19 @@
     <rMaterial name="materials:Oxygen"/>
    </MaterialFraction>
   </CompositeMaterial>
+  <CompositeMaterial name="MB4ShieldsBoronPolyethylUH050" density="1.005*g/cm3 " symbol=" " method="mixture by weight">
+   <MaterialFraction fraction="0.8322">
+    <rMaterial name="materials:Carbon"/>
+   </MaterialFraction>
+   <MaterialFraction fraction="0.1178">
+    <rMaterial name="materials:Hydrogen"/>
+   </MaterialFraction>
+   <MaterialFraction fraction="0.00995">
+    <rMaterial name="materials:Bor 10"/>
+   </MaterialFraction>
+   <MaterialFraction fraction="0.04005">
+    <rMaterial name="materials:Bor 11"/>
+   </MaterialFraction>
+  </CompositeMaterial>
  </MaterialSection>
 </DDDefinition>
diff --git a/Geometry/MuonCommonData/data/mb4Shield/2021/v2/mb4Shield.xml b/Geometry/MuonCommonData/data/mb4Shield/2021/v2/mb4Shield.xml
new file mode 100644
index 0000000000000..4240f06fee512
--- /dev/null
+++ b/Geometry/MuonCommonData/data/mb4Shield/2021/v2/mb4Shield.xml
@@ -0,0 +1,3782 @@
+<?xml version="1.0"?>
+<DDDefinition xmlns="http://www.cern.ch/cms/DDL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.cern.ch/cms/DetectorDescription/Schema/DDLSchema.xsd">
+  <!--++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ INFO ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-->
+  <!-- DT NEUTRONS SHIELDS                                                                                                      -->
+  <!-- Author: Sergio Lo Meo (sergio.lo.meo@cern.ch)                                                                            -->
+  <!-- First Version 2019: In YB-2 YB+2 added Sectors 13, 4                                                                     -->
+  <!-- Second Version 2021: In YB-2 YB+2 added Sectors 1,2,3,4,5,6,7 and in YB0 added Sectors 1,2,3,5,6,7                       -->
+  <!-- Last Version 8/11/2024: cleaned the code, adjust dimensions and materials                                                -->
+  <!-- Legend: P = positive, N = negative, DT numbering is used for sectors. For example: MB4ShieldYB2S7N_7 = YB-2/MB4/S7       -->
+  <!--++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-->
+  <ConstantsSection label="mb4Shield.xml" eval="true">
+    <Constant name="Tile1_x" value="(960.0/2.0)*mm"/>        
+    <Constant name="Tile1_y" value="(610.0/2.0)*mm"/>        
+    <Constant name="Tile2_x" value="(1456.0/2.0)*mm"/>       
+    <Constant name="Tile2_y" value="(827.0/2.0)*mm"/>        
+    <Constant name="Tile3_x" value="(1756.0/2.0)*mm"/>       
+    <Constant name="Tile3_y" value="(827.0/2.0)*mm"/>        
+    <Constant name="ShieldAl_xyz" value="(3.0/2.0)*mm"/>     
+    <Constant name="ShieldLead_z" value="(7.0/2.0)*mm"/>     
+    <Constant name="ShieldSteel_z" value="(20.0/2.0)*mm"/>   
+    <Constant name="ShieldBoroton_z" value="(90.0/2.0)*mm"/> 
+    <Constant name="ShieldBoroton2_z" value="(30.0/2.0)*mm"/>
+    <Constant name="ShieldBoroton1_z" value="(50.8/2.0)*mm"/>
+    <Constant name="ShieldSteel1_z" value="(10.0/2.0)*mm"/>  
+    <Constant name="CoordZ_1" value="-3.5*mm"/> 
+    <Constant name="CoordZ_2" value="15.0*mm"/>
+    <Constant name="CoordZ_3" value="45.0*mm"/>
+    <Constant name="CoordZ_4" value="19.25*mm"/>
+    <Constant name="CoordZ_5" value="0.75*mm"/>
+    <Constant name="CoordZ_6" value="-19.25*mm"/>
+    <Constant name="CoordZ_7" value="25.4*mm"/>  
+    <Constant name="RadiusMB4ShieldS3" value="[mb4:MB4BigUnitRadius]+[mbCommon:MBHeight_With1RPC]+[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]+1.85*mm"/> 
+  </ConstantsSection> 
+<!--++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-->
+<!--                                                                  SOLID SECTION                                                                     -->
+<!--++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--> 
+  <SolidSection  label="mb4Shield.xml">
+<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  YB-2  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ --> 
+<!--   S13   --> 
+    <Box name="MB4ShieldTopN_13" dx="3.0*[Tile1_x] + [ShieldAl_xyz]" dy="4.0*[Tile1_y] + [ShieldAl_xyz]" dz="[ShieldAl_xyz]+[ShieldBoroton1_z]+[ShieldLead_z]" />
+    <Box name="Tile1_MB4ShieldTopN_13" dx="[Tile1_x]" dy="[Tile1_y]"  dz="[ShieldBoroton1_z]" />  
+    <Box name="Tile2_MB4ShieldTopN_13" dx="[Tile1_x]" dy="[Tile1_y]"  dz="[ShieldLead_z]" />
+<!--   S4   --> 
+    <Box name="MB4ShieldTopN_4" dx="3.0*[Tile1_x]+ [ShieldAl_xyz]" dy="4.0*[Tile1_y]+ [ShieldAl_xyz]" dz="[ShieldAl_xyz]+[ShieldBoroton_z]+[ShieldLead_z]" /> 
+    <Box name="Tile1_MB4ShieldTopN_4" dx="[Tile1_x]" dy="[Tile1_y]" dz="[ShieldBoroton_z]" />
+    <Box name="Tile2_MB4ShieldTopN_4" dx="[Tile1_x]" dy="[Tile1_y]" dz="[ShieldLead_z]" />  
+<!--   S3    --> 
+    <Box name="MB4ShieldYB2S3N_3" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB2S3N_3" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB2S3N_3" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />
+<!--   S5    --> 
+    <Box name="MB4ShieldYB2S5N_5" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB2S5N_5" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB2S5N_5" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />
+<!--   S2    --> 
+    <Box name="MB4ShieldYB2S2N_2" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB2S2N_2" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB2S2N_2" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!--   S6    --> 
+    <Box name="MB4ShieldYB2S6N_6" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB2S6N_6" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB2S6N_6" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!--   S7    --> 
+    <Box name="MB4ShieldYB2S7N_7" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB2S7N_7" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB2S7N_7" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!--   S1    --> 
+    <Box name="MB4ShieldYB2S1N_1" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB2S1N_1" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB2S1N_1" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />
+<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  YB+2  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ --> 
+<!--   S13   --> 
+    <Box name="MB4ShieldTopP_13" dx="3.0*[Tile1_x] + [ShieldAl_xyz]" dy="4.0*[Tile1_y] + [ShieldAl_xyz]" dz="[ShieldAl_xyz]+[ShieldBoroton_z]+[ShieldLead_z]" />
+    <Box name="Tile1_MB4ShieldTopP_13" dx="[Tile1_x]" dy="[Tile1_y]" dz="[ShieldBoroton_z]" />
+    <Box name="Tile2_MB4ShieldTopP_13" dx="[Tile1_x]" dy="[Tile1_y]" dz="[ShieldLead_z]" />  
+<!--   S4   --> 
+    <Box name="MB4ShieldTopP_4" dx="3.0*[Tile1_x]+ [ShieldAl_xyz]" dy="4.0*[Tile1_y]+ [ShieldAl_xyz]" dz="[ShieldAl_xyz]+[ShieldBoroton_z]+[ShieldLead_z]" />
+    <Box name="Tile1_MB4ShieldTopP_4" dx="[Tile1_x]" dy="[Tile1_y]"  dz="[ShieldBoroton_z]" />  
+    <Box name="Tile2_MB4ShieldTopP_4" dx="[Tile1_x]" dy="[Tile1_y]"  dz="[ShieldLead_z]" />
+<!--   S3    --> 
+    <Box name="MB4ShieldYB2S3P_3" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB2S3P_3" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB2S3P_3" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!--   S5    --> 
+    <Box name="MB4ShieldYB2S5P_5" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB2S5P_5" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB2S5P_5" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />        
+<!--   S2    --> 
+    <Box name="MB4ShieldYB2S2P_2" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB2S2P_2" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB2S2P_2" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />        
+<!--   S6    --> 
+    <Box name="MB4ShieldYB2S6P_6" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB2S6P_6" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB2S6P_6" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!--   S7    --> 
+    <Box name="MB4ShieldYB2S7P_7" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB2S7P_7" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB2S7P_7" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!--   S1    --> 
+    <Box name="MB4ShieldYB2S1P_1" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB2S1P_1" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB2S1P_1" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  YB-1  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ --> 
+<!--   S13   --> 
+    <Box name="MB4ShieldYB1TopN_13" dx="2.0*[Tile2_x] + [ShieldAl_xyz]" dy="3.0*[Tile2_y] + [ShieldAl_xyz]" dz="[ShieldBoroton_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB1TopN_13" dx="[Tile2_x]" dy="[Tile2_y]" dz="[ShieldBoroton_z]" /> 
+    <Box name="Tile2_MB4ShieldYB1TopN_13" dx="[Tile2_x]" dy="[Tile2_y]" dz="[ShieldLead_z]" /> 
+<!--   S4   --> 
+    <Box name="MB4ShieldYB1TopN_4" dx="2.0*[Tile2_x] + [ShieldAl_xyz]" dy="3.0*[Tile2_y] + [ShieldAl_xyz]" dz="[ShieldBoroton_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB1TopN_4" dx="[Tile2_x]" dy="[Tile2_y]" dz="[ShieldBoroton_z]" /> 
+    <Box name="Tile2_MB4ShieldYB1TopN_4" dx="[Tile2_x]" dy="[Tile2_y]" dz="[ShieldLead_z]" />  
+<!--   S3    --> 
+    <Box name="MB4ShieldYB1S3N_3" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB1S3N_3" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB1S3N_3" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!--   S5    --> 
+    <Box name="MB4ShieldYB1S5N_5" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB1S5N_5" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB1S5N_5" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />        
+<!--   S2    --> 
+    <Box name="MB4ShieldYB1S2N_2" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB1S2N_2" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB1S2N_2" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!--   S6    --> 
+    <Box name="MB4ShieldYB1S6N_6" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB1S6N_6" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB1S6N_6" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!--   S7    --> 
+    <Box name="MB4ShieldYB1S7N_7" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB1S7N_7" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB1S7N_7" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!--   S1    --> 
+    <Box name="MB4ShieldYB1S1N_1" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB1S1N_1" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB1S1N_1" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  YB+1  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ --> 
+<!--   S13   --> 
+    <Box name="MB4ShieldYB1TopP_13" dx="2.0*[Tile2_x] + [ShieldAl_xyz]" dy="3.0*[Tile2_y] + [ShieldAl_xyz]" dz="[ShieldBoroton_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB1TopP_13" dx="[Tile2_x]" dy="[Tile2_y]" dz="[ShieldBoroton_z]" /> 
+    <Box name="Tile2_MB4ShieldYB1TopP_13" dx="[Tile2_x]" dy="[Tile2_y]" dz="[ShieldLead_z]" /> 
+<!--   S4   --> 
+    <Box name="MB4ShieldYB1TopP_4" dx="2.0*[Tile2_x] + [ShieldAl_xyz]" dy="3.0*[Tile2_y] + [ShieldAl_xyz]" dz="[ShieldBoroton_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB1TopP_4" dx="[Tile2_x]" dy="[Tile2_y]" dz="[ShieldBoroton_z]" /> 
+    <Box name="Tile2_MB4ShieldYB1TopP_4" dx="[Tile2_x]" dy="[Tile2_y]" dz="[ShieldLead_z]" />
+<!--   S3    --> 
+    <Box name="MB4ShieldYB1S3P_3" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB1S3P_3" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB1S3P_3" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!--   S5    --> 
+    <Box name="MB4ShieldYB1S5P_5" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB1S5P_5" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB1S5P_5" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!--   S2    --> 
+    <Box name="MB4ShieldYB1S2P_2" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB1S2P_2" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB1S2P_2" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!--   S6    --> 
+    <Box name="MB4ShieldYB1S6P_6" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB1S6P_6" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB1S6P_6" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!--   S7    --> 
+    <Box name="MB4ShieldYB1S7P_7" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB1S7P_7" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB1S7P_7" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!--   S1    --> 
+    <Box name="MB4ShieldYB1S1P_1" dx="2.0*[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB1S1P_1" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB1S1P_1" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />         
+<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  YB0  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ --> 
+<!--   S3    --> 
+    <Box name="MB4ShieldYB0S3" dx="[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB0S3" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB0S3" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />
+<!--   S5    --> 
+    <Box name="MB4ShieldYB0S5" dx="[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB0S5" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB0S5" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />
+<!--   S2    --> 
+    <Box name="MB4ShieldYB0S2" dx="[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB0S2" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB0S2" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />
+<!--   S6    --> 
+    <Box name="MB4ShieldYB0S6" dx="[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB0S6" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB0S6" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />
+<!--   S1    --> 
+    <Box name="MB4ShieldYB0S1" dx="[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB0S1" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB0S1" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />
+<!--   S7    --> 
+    <Box name="MB4ShieldYB0S7" dx="[Tile3_x] + [ShieldAl_xyz]" dy="3.0*[Tile3_y] + [ShieldAl_xyz]" dz="[ShieldBoroton2_z]+[ShieldLead_z]+[ShieldAl_xyz]" />
+    <Box name="Tile1_MB4ShieldYB0S7" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldBoroton2_z]" /> 
+    <Box name="Tile2_MB4ShieldYB0S7" dx="[Tile3_x]" dy="[Tile3_y]" dz="[ShieldLead_z]" />
+<!-- +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  END OF SOLID SECTION +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->   
+  </SolidSection>
+<!--+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-->
+<!--                                                                    LOGIC SECTION                                                                    -->
+<!--+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--> 
+  <LogicalPartSection label="mb4Shield.xml">
+<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  YB-2  ++++++++++x+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ --> 
+<!--   S13   --> 
+    <LogicalPart name="MB4ShieldTopN_13" category="unspecified">
+      <rSolid name="MB4ShieldTopN_13"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldTopN_13" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldTopN_13"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/> 
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldTopN_13" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldTopN_13"/>
+             <rMaterial name="materials:Lead"/> 
+    </LogicalPart>
+<!--   S4   --> 
+    <LogicalPart name="MB4ShieldTopN_4" category="unspecified">
+      <rSolid name="MB4ShieldTopN_4"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldTopN_4" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldTopN_4"/>
+      <rMaterial name="materials:Boron PolyethylHD"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldTopN_4" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldTopN_4"/>
+      <rMaterial name="materials:Lead"/>     
+    </LogicalPart>   
+<!--   S3    --> 
+    <LogicalPart name="MB4ShieldYB2S3N_3" category="unspecified">
+      <rSolid name="MB4ShieldYB2S3N_3"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB2S3N_3" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB2S3N_3"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB2S3N_3" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB2S3N_3"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S5    --> 
+    <LogicalPart name="MB4ShieldYB2S5N_5" category="unspecified">
+      <rSolid name="MB4ShieldYB2S5N_5"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB2S5N_5" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB2S5N_5"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB2S5N_5" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB2S5N_5"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S2    --> 
+    <LogicalPart name="MB4ShieldYB2S2N_2" category="unspecified">
+      <rSolid name="MB4ShieldYB2S2N_2"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB2S2N_2" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB2S2N_2"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB2S2N_2" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB2S2N_2"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S6    --> 
+    <LogicalPart name="MB4ShieldYB2S6N_6" category="unspecified">
+      <rSolid name="MB4ShieldYB2S6N_6"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB2S6N_6" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB2S6N_6"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB2S6N_6" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB2S6N_6"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S7    --> 
+    <LogicalPart name="MB4ShieldYB2S7N_7" category="unspecified">
+      <rSolid name="MB4ShieldYB2S7N_7"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB2S7N_7" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB2S7N_7"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB2S7N_7" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB2S7N_7"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S1    --> 
+    <LogicalPart name="MB4ShieldYB2S1N_1" category="unspecified">
+      <rSolid name="MB4ShieldYB2S1N_1"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB2S1N_1" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB2S1N_1"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB2S1N_1" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB2S1N_1"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  YB+2  ++++++++++x+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ --> 
+<!--   S13   --> 
+    <LogicalPart name="MB4ShieldTopP_13" category="unspecified">
+      <rSolid name="MB4ShieldTopP_13"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldTopP_13" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldTopP_13"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldTopP_13" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldTopP_13"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S4   --> 
+    <LogicalPart name="MB4ShieldTopP_4" category="unspecified">
+      <rSolid name="MB4ShieldTopP_4"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldTopP_4" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldTopP_4"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldTopP_4" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldTopP_4"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S3    --> 
+    <LogicalPart name="MB4ShieldYB2S3P_3" category="unspecified">
+      <rSolid name="MB4ShieldYB2S3P_3"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB2S3P_3" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB2S3P_3"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB2S3P_3" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB2S3P_3"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+ <!--   S5    --> 
+    <LogicalPart name="MB4ShieldYB2S5P_5" category="unspecified">
+      <rSolid name="MB4ShieldYB2S5P_5"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB2S5P_5" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB2S5P_5"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB2S5P_5" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB2S5P_5"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+ <!--   S2    --> 
+    <LogicalPart name="MB4ShieldYB2S2P_2" category="unspecified">
+      <rSolid name="MB4ShieldYB2S2P_2"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB2S2P_2" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB2S2P_2"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB2S2P_2" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB2S2P_2"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+ <!--   S6    --> 
+    <LogicalPart name="MB4ShieldYB2S6P_6" category="unspecified">
+      <rSolid name="MB4ShieldYB2S6P_6"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB2S6P_6" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB2S6P_6"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB2S6P_6" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB2S6P_6"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+ <!--   S7    --> 
+    <LogicalPart name="MB4ShieldYB2S7P_7" category="unspecified">
+      <rSolid name="MB4ShieldYB2S7P_7"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB2S7P_7" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB2S7P_7"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB2S7P_7" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB2S7P_7"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+ <!--   S1    --> 
+    <LogicalPart name="MB4ShieldYB2S1P_1" category="unspecified">
+      <rSolid name="MB4ShieldYB2S1P_1"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB2S1P_1" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB2S1P_1"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB2S1P_1" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB2S1P_1"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  YB-1  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ --> 
+<!--   S13   --> 
+    <LogicalPart name="MB4ShieldYB1TopN_13" category="unspecified">
+      <rSolid name="MB4ShieldYB1TopN_13"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB1TopN_13" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB1TopN_13"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB1TopN_13" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB1TopN_13"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S4   --> 
+    <LogicalPart name="MB4ShieldYB1TopN_4" category="unspecified">
+      <rSolid name="MB4ShieldYB1TopN_4"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB1TopN_4" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB1TopN_4"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB1TopN_4" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB1TopN_4"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S3    --> 
+    <LogicalPart name="MB4ShieldYB1S3N_3" category="unspecified">
+      <rSolid name="MB4ShieldYB1S3N_3"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB1S3N_3" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB1S3N_3"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB1S3N_3" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB1S3N_3"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S5    --> 
+    <LogicalPart name="MB4ShieldYB1S5N_5" category="unspecified">
+      <rSolid name="MB4ShieldYB1S5N_5"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB1S5N_5" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB1S5N_5"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB1S5N_5" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB1S5N_5"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S2    --> 
+    <LogicalPart name="MB4ShieldYB1S2N_2" category="unspecified">
+      <rSolid name="MB4ShieldYB1S2N_2"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB1S2N_2" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB1S2N_2"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB1S2N_2" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB1S2N_2"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S6    --> 
+    <LogicalPart name="MB4ShieldYB1S6N_6" category="unspecified">
+      <rSolid name="MB4ShieldYB1S6N_6"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB1S6N_6" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB1S6N_6"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB1S6N_6" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB1S6N_6"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S7    --> 
+    <LogicalPart name="MB4ShieldYB1S7N_7" category="unspecified">
+      <rSolid name="MB4ShieldYB1S7N_7"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB1S7N_7" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB1S7N_7"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB1S7N_7" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB1S7N_7"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S1    --> 
+    <LogicalPart name="MB4ShieldYB1S1N_1" category="unspecified">
+      <rSolid name="MB4ShieldYB1S1N_1"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB1S1N_1" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB1S1N_1"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB1S1N_1" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB1S1N_1"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  YB+1  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ --> 
+<!--   S13   --> 
+    <LogicalPart name="MB4ShieldYB1TopP_13" category="unspecified">
+      <rSolid name="MB4ShieldYB1TopP_13"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB1TopP_13" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB1TopP_13"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB1TopP_13" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB1TopP_13"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S4   --> 
+    <LogicalPart name="MB4ShieldYB1TopP_4" category="unspecified">
+      <rSolid name="MB4ShieldYB1TopP_4"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB1TopP_4" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB1TopP_4"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB1TopP_4" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB1TopP_4"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S3    --> 
+    <LogicalPart name="MB4ShieldYB1S3P_3" category="unspecified">
+      <rSolid name="MB4ShieldYB1S3P_3"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB1S3P_3" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB1S3P_3"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB1S3P_3" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB1S3P_3"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S5    --> 
+    <LogicalPart name="MB4ShieldYB1S5P_5" category="unspecified">
+      <rSolid name="MB4ShieldYB1S5P_5"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB1S5P_5" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB1S5P_5"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB1S5P_5" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB1S5P_5"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S2    --> 
+    <LogicalPart name="MB4ShieldYB1S2P_2" category="unspecified">
+      <rSolid name="MB4ShieldYB1S2P_2"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB1S2P_2" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB1S2P_2"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB1S2P_2" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB1S2P_2"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S6    --> 
+    <LogicalPart name="MB4ShieldYB1S6P_6" category="unspecified">
+      <rSolid name="MB4ShieldYB1S6P_6"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB1S6P_6" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB1S6P_6"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB1S6P_6" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB1S6P_6"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S7    --> 
+    <LogicalPart name="MB4ShieldYB1S7P_7" category="unspecified">
+      <rSolid name="MB4ShieldYB1S7P_7"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB1S7P_7" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB1S7P_7"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB1S7P_7" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB1S7P_7"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S1    --> 
+    <LogicalPart name="MB4ShieldYB1S1P_1" category="unspecified">
+      <rSolid name="MB4ShieldYB1S1P_1"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB1S1P_1" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB1S1P_1"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB1S1P_1" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB1S1P_1"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  YB0  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ --> 
+<!--   S3    --> 
+    <LogicalPart name="MB4ShieldYB0S3" category="unspecified">
+      <rSolid name="MB4ShieldYB0S3"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB0S3" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB0S3"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB0S3" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB0S3"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S5    --> 
+    <LogicalPart name="MB4ShieldYB0S5" category="unspecified">
+      <rSolid name="MB4ShieldYB0S5"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB0S5" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB0S5"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB0S5" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB0S5"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S2    --> 
+    <LogicalPart name="MB4ShieldYB0S2" category="unspecified">
+      <rSolid name="MB4ShieldYB0S2"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB0S2" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB0S2"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB0S2" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB0S2"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S6    --> 
+    <LogicalPart name="MB4ShieldYB0S6" category="unspecified">
+      <rSolid name="MB4ShieldYB0S6"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB0S6" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB0S6"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB0S6" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB0S6"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S1    --> 
+    <LogicalPart name="MB4ShieldYB0S1" category="unspecified">
+      <rSolid name="MB4ShieldYB0S1"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB0S1" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB0S1"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB0S1" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB0S1"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!--   S7    --> 
+    <LogicalPart name="MB4ShieldYB0S7" category="unspecified">
+      <rSolid name="MB4ShieldYB0S7"/>
+      <rMaterial name="materials:Aluminium"/>
+    </LogicalPart>
+    <LogicalPart name="Tile1_MB4ShieldYB0S7" category="unspecified">
+      <rSolid name="Tile1_MB4ShieldYB0S7"/>
+      <rMaterial name="materials:MB4ShieldsBoronPolyethylUH050"/>
+    </LogicalPart>
+    <LogicalPart name="Tile2_MB4ShieldYB0S7" category="unspecified">
+      <rSolid name="Tile2_MB4ShieldYB0S7"/>
+      <rMaterial name="materials:Lead"/>
+    </LogicalPart>
+<!-- +++++++++++++++++++++++++++++++++++++++++++++++++++++++   END OF LOGICAL PART SECTION  ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ --> 
+</LogicalPartSection>
+<!--+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-->
+<!--                                                                POSITION SECTION                                                                     -->
+<!--+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--> 
+  <PosPartSection label="mb4Shield.xml">
+<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  YB-2  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ --> 
+<!--   S13   --> 
+    <PosPart copyNumber="13">  
+      <rParent name="muonBase:MBWheel_2N"/>
+      <rChild name="MB4ShieldTopN_13"/>
+      <rRotation name="rotations:MM404"/>
+      <Translation x="-[mb4:MB4TopPos_x]" y="[mb4:MB4TopPos_y] + 240.0*mm" z="[mbCommon:MBPos_z]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile1_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="[Tile1_y]*3.0" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile1_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile1_y]*3.0" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile1_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="[Tile1_y]*3.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile1_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile1_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile1_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="7">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile1_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="-[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="8">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile1_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="9">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile1_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="-[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="10">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile1_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="-3.0*[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="11">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile1_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-3.0*[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="12">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile1_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="-3.0*[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile2_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="[Tile1_y]*3.0" z="[CoordZ_7]"/>
+    </PosPart>
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile2_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile1_y]*3.0" z="[CoordZ_7]"/>
+    </PosPart>
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile2_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="[Tile1_y]*3.0" z="[CoordZ_7]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile2_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="[Tile1_y]" z="[CoordZ_7]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile2_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile1_y]" z="[CoordZ_7]"/>
+    </PosPart>
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile2_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="[Tile1_y]" z="[CoordZ_7]"/>
+    </PosPart> 
+    <PosPart copyNumber="7">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile2_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="-[Tile1_y]" z="[CoordZ_7]"/>
+    </PosPart> 
+    <PosPart copyNumber="8">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile2_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile1_y]" z="[CoordZ_7]"/>
+    </PosPart>
+    <PosPart copyNumber="9">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile2_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="-[Tile1_y]" z="[CoordZ_7]"/>
+    </PosPart> 
+    <PosPart copyNumber="10">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile2_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="-3.0*[Tile1_y]" z="[CoordZ_7]"/>
+    </PosPart> 
+    <PosPart copyNumber="11">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile2_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-3.0*[Tile1_y]" z="[CoordZ_7]"/>
+    </PosPart>
+    <PosPart copyNumber="12">  
+      <rParent name="MB4ShieldTopN_13"/>
+      <rChild name="Tile2_MB4ShieldTopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="-3.0*[Tile1_y]" z="[CoordZ_7]"/>
+    </PosPart> 
+    <!--   S4   --> 
+    <PosPart copyNumber="4">  
+      <rParent name="muonBase:MBWheel_2N"/>
+      <rChild name="MB4ShieldTopN_4"/>
+      <rRotation name="rotations:MM404"/>
+      <Translation x="[mb4:MB4TopPos_x]" y="[mb4:MB4TopPos_y] + 240.0*mm" z="[mbCommon:MBPos_z]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile1_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="[Tile1_y]*3.0" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile1_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile1_y]*3.0" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile1_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="[Tile1_y]*3.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile1_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile1_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile1_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="7">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile1_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="-[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="8">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile1_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="9">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile1_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="-[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="10">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile1_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="-3.0*[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="11">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile1_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-3.0*[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="12">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile1_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="-3.0*[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile2_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="[Tile1_y]*3.0" z="[CoordZ_3]"/>
+    </PosPart>
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile2_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile1_y]*3.0" z="[CoordZ_3]"/>
+    </PosPart>
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile2_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="[Tile1_y]*3.0" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile2_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile2_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart>
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile2_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="7">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile2_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="-[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="8">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile2_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart>
+    <PosPart copyNumber="9">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile2_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="-[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="10">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile2_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="-3.0*[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="11">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile2_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-3.0*[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart>
+    <PosPart copyNumber="12">  
+      <rParent name="MB4ShieldTopN_4"/>
+      <rChild name="Tile2_MB4ShieldTopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="-3.0*[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+ <!--   S3  --> 
+    <PosPart copyNumber="3">
+      <rParent name="muonBase:MBWheel_2N"/>
+      <rChild name="MB4ShieldYB2S3N_3"/>
+      <rRotation name="rotations:MM403"/>
+      <Translation x="270.0*mm + [RadiusMB4ShieldS3]*cos(60.*deg+[mb4:MB4BigPosAngle])" y="-150.0*mm + [RadiusMB4ShieldS3]*sin(60.*deg+[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S3N_3"/>
+      <rChild name="Tile1_MB4ShieldYB2S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S3N_3"/>
+      <rChild name="Tile1_MB4ShieldYB2S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S3N_3"/>
+      <rChild name="Tile1_MB4ShieldYB2S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S3N_3"/>
+      <rChild name="Tile1_MB4ShieldYB2S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S3N_3"/>
+      <rChild name="Tile1_MB4ShieldYB2S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S3N_3"/>
+      <rChild name="Tile1_MB4ShieldYB2S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S3N_3"/>
+      <rChild name="Tile2_MB4ShieldYB2S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S3N_3"/>
+      <rChild name="Tile2_MB4ShieldYB2S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S3N_3"/>
+      <rChild name="Tile2_MB4ShieldYB2S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S3N_3"/>
+      <rChild name="Tile2_MB4ShieldYB2S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S3N_3"/>
+      <rChild name="Tile2_MB4ShieldYB2S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S3N_3"/>
+      <rChild name="Tile2_MB4ShieldYB2S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S5   --> 
+    <PosPart copyNumber="5">
+      <rParent name="muonBase:MBWheel_2N"/>
+      <rChild name="MB4ShieldYB2S5N_5"/>
+      <rRotation name="rotations:MM405"/>
+      <Translation x="-270.00*mm + [RadiusMB4ShieldS3]*cos(120.*deg-[mb4:MB4BigPosAngle])" y="-150.0*mm + [RadiusMB4ShieldS3]*sin(120.*deg-[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>
+    </PosPart> 
+ <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S5N_5"/>
+      <rChild name="Tile1_MB4ShieldYB2S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S5N_5"/>
+      <rChild name="Tile1_MB4ShieldYB2S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S5N_5"/>
+      <rChild name="Tile1_MB4ShieldYB2S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S5N_5"/>
+      <rChild name="Tile1_MB4ShieldYB2S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S5N_5"/>
+      <rChild name="Tile1_MB4ShieldYB2S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S5N_5"/>
+      <rChild name="Tile1_MB4ShieldYB2S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S5N_5"/>
+      <rChild name="Tile2_MB4ShieldYB2S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S5N_5"/>
+      <rChild name="Tile2_MB4ShieldYB2S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S5N_5"/>
+      <rChild name="Tile2_MB4ShieldYB2S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S5N_5"/>
+      <rChild name="Tile2_MB4ShieldYB2S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S5N_5"/>
+      <rChild name="Tile2_MB4ShieldYB2S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S5N_5"/>
+      <rChild name="Tile2_MB4ShieldYB2S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S2   --> 
+    <PosPart copyNumber="2">
+      <rParent name="muonBase:MBWheel_2N"/>
+      <rChild name="MB4ShieldYB2S2N_2"/>
+      <rRotation name="rotations:MM402"/>
+      <Translation x="150.0*mm + [RadiusMB4ShieldS3]*cos(30.*deg+[mb4:MB4BigPosAngle])" y="-260.0*mm + [RadiusMB4ShieldS3]*sin(30.*deg+[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S2N_2"/>
+      <rChild name="Tile1_MB4ShieldYB2S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S2N_2"/>
+      <rChild name="Tile1_MB4ShieldYB2S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S2N_2"/>
+      <rChild name="Tile1_MB4ShieldYB2S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S2N_2"/>
+      <rChild name="Tile1_MB4ShieldYB2S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S2N_2"/>
+      <rChild name="Tile1_MB4ShieldYB2S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S2N_2"/>
+      <rChild name="Tile1_MB4ShieldYB2S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S2N_2"/>
+      <rChild name="Tile2_MB4ShieldYB2S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S2N_2"/>
+      <rChild name="Tile2_MB4ShieldYB2S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S2N_2"/>
+      <rChild name="Tile2_MB4ShieldYB2S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S2N_2"/>
+      <rChild name="Tile2_MB4ShieldYB2S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S2N_2"/>
+      <rChild name="Tile2_MB4ShieldYB2S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S2N_2"/>
+      <rChild name="Tile2_MB4ShieldYB2S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S6   --> 
+    <PosPart copyNumber="6">
+      <rParent name="muonBase:MBWheel_2N"/>
+      <rChild name="MB4ShieldYB2S6N_6"/>
+      <rRotation name="rotations:MM406"/>
+      <Translation x="-150.0*mm + [RadiusMB4ShieldS3]*cos(150.*deg-[mb4:MB4BigPosAngle])" y="-260.0*mm + [RadiusMB4ShieldS3]*sin(150.*deg-[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>      </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S6N_6"/>
+      <rChild name="Tile1_MB4ShieldYB2S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S6N_6"/>
+      <rChild name="Tile1_MB4ShieldYB2S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S6N_6"/>
+      <rChild name="Tile1_MB4ShieldYB2S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S6N_6"/>
+      <rChild name="Tile1_MB4ShieldYB2S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S6N_6"/>
+      <rChild name="Tile1_MB4ShieldYB2S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S6N_6"/>
+      <rChild name="Tile1_MB4ShieldYB2S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S6N_6"/>
+      <rChild name="Tile2_MB4ShieldYB2S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S6N_6"/>
+      <rChild name="Tile2_MB4ShieldYB2S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S6N_6"/>
+      <rChild name="Tile2_MB4ShieldYB2S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S6N_6"/>
+      <rChild name="Tile2_MB4ShieldYB2S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S6N_6"/>
+      <rChild name="Tile2_MB4ShieldYB2S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S6N_6"/>
+      <rChild name="Tile2_MB4ShieldYB2S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S7   --> 
+    <PosPart copyNumber="7">
+      <rParent name="muonBase:MBWheel_2N"/>
+      <rChild name="MB4ShieldYB2S7N_7"/>
+      <rRotation name="rotations:MM407"/>
+      <Translation x="[RadiusMB4ShieldS3]*cos(180.*deg-[mb4:MB4BigPosAngle])" y="-310.0*mm + [RadiusMB4ShieldS3]*sin(180.*deg-[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>     
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S7N_7"/>
+      <rChild name="Tile1_MB4ShieldYB2S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S7N_7"/>
+      <rChild name="Tile1_MB4ShieldYB2S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S7N_7"/>
+      <rChild name="Tile1_MB4ShieldYB2S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S7N_7"/>
+      <rChild name="Tile1_MB4ShieldYB2S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S7N_7"/>
+      <rChild name="Tile1_MB4ShieldYB2S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S7N_7"/>
+      <rChild name="Tile1_MB4ShieldYB2S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S7N_7"/>
+      <rChild name="Tile2_MB4ShieldYB2S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S7N_7"/>
+      <rChild name="Tile2_MB4ShieldYB2S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S7N_7"/>
+      <rChild name="Tile2_MB4ShieldYB2S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S7N_7"/>
+      <rChild name="Tile2_MB4ShieldYB2S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S7N_7"/>
+      <rChild name="Tile2_MB4ShieldYB2S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S7N_7"/>
+      <rChild name="Tile2_MB4ShieldYB2S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S1   --> 
+    <PosPart copyNumber="1">
+      <rParent name="muonBase:MBWheel_2N"/>
+      <rChild name="MB4ShieldYB2S1N_1"/>
+      <rRotation name="rotations:MM401"/>
+      <Translation x="-60.0*mm + [RadiusMB4ShieldS3]" y="-320.0*mm + [mb4:MB4BigPos_y]" z="[mbCommon:MBPos_z]"/>     
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S1N_1"/>
+      <rChild name="Tile1_MB4ShieldYB2S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S1N_1"/>
+      <rChild name="Tile1_MB4ShieldYB2S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S1N_1"/>
+      <rChild name="Tile1_MB4ShieldYB2S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S1N_1"/>
+      <rChild name="Tile1_MB4ShieldYB2S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S1N_1"/>
+      <rChild name="Tile1_MB4ShieldYB2S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S1N_1"/>
+      <rChild name="Tile1_MB4ShieldYB2S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S1N_1"/>
+      <rChild name="Tile2_MB4ShieldYB2S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S1N_1"/>
+      <rChild name="Tile2_MB4ShieldYB2S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S1N_1"/>
+      <rChild name="Tile2_MB4ShieldYB2S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S1N_1"/>
+      <rChild name="Tile2_MB4ShieldYB2S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S1N_1"/>
+      <rChild name="Tile2_MB4ShieldYB2S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S1N_1"/>
+      <rChild name="Tile2_MB4ShieldYB2S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  YB+2  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
+    <!--   S13   --> 
+    <PosPart copyNumber="13">  
+      <rParent name="muonBase:MBWheel_2P"/>
+      <rChild name="MB4ShieldTopP_13"/>
+      <rRotation name="rotations:MM404"/>
+      <Translation x="-[mb4:MB4TopPos_x]" y="[mb4:MB4TopPos_y] + 240.0*mm" z="-[mbCommon:MBPos_z]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile1_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/> 
+      <Translation x="-2.0*[Tile1_x]" y="[Tile1_y]*3.0" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile1_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile1_y]*3.0" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile1_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="[Tile1_y]*3.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile1_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile1_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile1_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="7">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile1_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="-[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="8">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile1_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="9">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile1_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="-[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="10">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile1_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="-3.0*[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="11">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile1_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-3.0*[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="12">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile1_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="-3.0*[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile2_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="[Tile1_y]*3.0" z="[CoordZ_3]"/>
+    </PosPart>
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile2_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile1_y]*3.0" z="[CoordZ_3]"/>
+    </PosPart>
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile2_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="[Tile1_y]*3.0" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile2_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile2_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart>
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile2_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="7">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile2_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="-[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="8">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile2_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart>
+    <PosPart copyNumber="9">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile2_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="-[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="10">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile2_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="-3.0*[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="11">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile2_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-3.0*[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart>
+    <PosPart copyNumber="12">  
+      <rParent name="MB4ShieldTopP_13"/>
+      <rChild name="Tile2_MB4ShieldTopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="-3.0*[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+<!--   S4   --> 
+    <PosPart copyNumber="4">  
+      <rParent name="muonBase:MBWheel_2P"/>
+      <rChild name="MB4ShieldTopP_4"/>
+      <rRotation name="rotations:MM404"/>
+      <Translation x="[mb4:MB4TopPos_x]" y="[mb4:MB4TopPos_y] + 240.0*mm" z="-[mbCommon:MBPos_z]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile1_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="[Tile1_y]*3.0" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile1_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile1_y]*3.0" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile1_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="[Tile1_y]*3.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile1_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile1_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile1_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="7">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile1_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="-[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="8">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile1_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="9">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile1_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="-[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="10">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile1_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="-3.0*[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="11">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile1_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-3.0*[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="12">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile1_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="-3.0*[Tile1_y]" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile2_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="[Tile1_y]*3.0" z="[CoordZ_3]"/>
+    </PosPart>
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile2_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile1_y]*3.0" z="[CoordZ_3]"/>
+    </PosPart>
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile2_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="[Tile1_y]*3.0" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile2_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile2_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart>
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile2_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="7">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile2_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="-[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="8">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile2_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart>
+    <PosPart copyNumber="9">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile2_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="-[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="10">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile2_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-2.0*[Tile1_x]" y="-3.0*[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="11">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile2_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-3.0*[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart>
+    <PosPart copyNumber="12">  
+      <rParent name="MB4ShieldTopP_4"/>
+      <rChild name="Tile2_MB4ShieldTopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="2.0*[Tile1_x]" y="-3.0*[Tile1_y]" z="[CoordZ_3]"/>
+    </PosPart> 
+<!--   S3   --> 
+    <PosPart copyNumber="3">
+      <rParent name="muonBase:MBWheel_2P"/>
+      <rChild name="MB4ShieldYB2S3P_3"/>
+      <rRotation name="rotations:RM1892"/>
+      <Translation x="270.00*mm + [RadiusMB4ShieldS3]*cos(60.*deg+[mb4:MB4BigPosAngle])" y="-150.0*mm + [RadiusMB4ShieldS3]*sin(60.*deg+[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S3P_3"/>
+      <rChild name="Tile1_MB4ShieldYB2S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S3P_3"/>
+      <rChild name="Tile1_MB4ShieldYB2S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S3P_3"/>
+      <rChild name="Tile1_MB4ShieldYB2S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S3P_3"/>
+      <rChild name="Tile1_MB4ShieldYB2S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S3P_3"/>
+      <rChild name="Tile1_MB4ShieldYB2S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S3P_3"/>
+      <rChild name="Tile1_MB4ShieldYB2S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S3P_3"/>
+      <rChild name="Tile2_MB4ShieldYB2S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S3P_3"/>
+      <rChild name="Tile2_MB4ShieldYB2S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S3P_3"/>
+      <rChild name="Tile2_MB4ShieldYB2S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S3P_3"/>
+      <rChild name="Tile2_MB4ShieldYB2S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S3P_3"/>
+      <rChild name="Tile2_MB4ShieldYB2S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S3P_3"/>
+      <rChild name="Tile2_MB4ShieldYB2S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S5   --> 
+    <PosPart copyNumber="5">
+      <rParent name="muonBase:MBWheel_2P"/>
+      <rChild name="MB4ShieldYB2S5P_5"/>
+      <rRotation name="rotations:RM1912"/>
+    <Translation x="-270.00*mm + [RadiusMB4ShieldS3]*cos(120.*deg-[mb4:MB4BigPosAngle])" y="-150.0*mm + [RadiusMB4ShieldS3]*sin(120.*deg-[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>     </PosPart>  
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S5P_5"/>
+      <rChild name="Tile1_MB4ShieldYB2S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S5P_5"/>
+      <rChild name="Tile1_MB4ShieldYB2S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S5P_5"/>
+      <rChild name="Tile1_MB4ShieldYB2S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S5P_5"/>
+      <rChild name="Tile1_MB4ShieldYB2S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S5P_5"/>
+      <rChild name="Tile1_MB4ShieldYB2S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S5P_5"/>
+      <rChild name="Tile1_MB4ShieldYB2S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S5P_5"/>
+      <rChild name="Tile2_MB4ShieldYB2S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S5P_5"/>
+      <rChild name="Tile2_MB4ShieldYB2S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S5P_5"/>
+      <rChild name="Tile2_MB4ShieldYB2S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S5P_5"/>
+      <rChild name="Tile2_MB4ShieldYB2S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S5P_5"/>
+      <rChild name="Tile2_MB4ShieldYB2S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S5P_5"/>
+      <rChild name="Tile2_MB4ShieldYB2S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S2   --> 
+    <PosPart copyNumber="2">
+      <rParent name="muonBase:MBWheel_2P"/>
+      <rChild name="MB4ShieldYB2S2P_2"/>
+      <rRotation name="rotations:RM1882"/>
+      <Translation x="150.00*mm + [RadiusMB4ShieldS3]*cos(30.*deg+[mb4:MB4BigPosAngle])" y="-260.0*mm + [RadiusMB4ShieldS3]*sin(30.*deg+[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>        </PosPart>    
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S2P_2"/>
+      <rChild name="Tile1_MB4ShieldYB2S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S2P_2"/>
+      <rChild name="Tile1_MB4ShieldYB2S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S2P_2"/>
+      <rChild name="Tile1_MB4ShieldYB2S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S2P_2"/>
+      <rChild name="Tile1_MB4ShieldYB2S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S2P_2"/>
+      <rChild name="Tile1_MB4ShieldYB2S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S2P_2"/>
+      <rChild name="Tile1_MB4ShieldYB2S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S2P_2"/>
+      <rChild name="Tile2_MB4ShieldYB2S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S2P_2"/>
+      <rChild name="Tile2_MB4ShieldYB2S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S2P_2"/>
+      <rChild name="Tile2_MB4ShieldYB2S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S2P_2"/>
+      <rChild name="Tile2_MB4ShieldYB2S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S2P_2"/>
+      <rChild name="Tile2_MB4ShieldYB2S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S2P_2"/>
+      <rChild name="Tile2_MB4ShieldYB2S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S6   --> 
+    <PosPart copyNumber="6">
+      <rParent name="muonBase:MBWheel_2P"/>
+      <rChild name="MB4ShieldYB2S6P_6"/>
+      <rRotation name="rotations:RM1922"/>
+    <Translation x="-150.0*mm + [RadiusMB4ShieldS3]*cos(150.*deg-[mb4:MB4BigPosAngle])" y="-260.0*mm + [RadiusMB4ShieldS3]*sin(150.*deg-[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>         </PosPart>    
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S6P_6"/>
+      <rChild name="Tile1_MB4ShieldYB2S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S6P_6"/>
+      <rChild name="Tile1_MB4ShieldYB2S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S6P_6"/>
+      <rChild name="Tile1_MB4ShieldYB2S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S6P_6"/>
+      <rChild name="Tile1_MB4ShieldYB2S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S6P_6"/>
+      <rChild name="Tile1_MB4ShieldYB2S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S6P_6"/>
+      <rChild name="Tile1_MB4ShieldYB2S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S6P_6"/>
+      <rChild name="Tile2_MB4ShieldYB2S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S6P_6"/>
+      <rChild name="Tile2_MB4ShieldYB2S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S6P_6"/>
+      <rChild name="Tile2_MB4ShieldYB2S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S6P_6"/>
+      <rChild name="Tile2_MB4ShieldYB2S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S6P_6"/>
+      <rChild name="Tile2_MB4ShieldYB2S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S6P_6"/>
+      <rChild name="Tile2_MB4ShieldYB2S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S7   --> 
+    <PosPart copyNumber="7">
+      <rParent name="muonBase:MBWheel_2P"/>
+      <rChild name="MB4ShieldYB2S7P_7"/>
+      <rRotation name="rotations:90XD"/>
+      <Translation x="[RadiusMB4ShieldS3]*cos(180.*deg-[mb4:MB4BigPosAngle])" y="-310.0*mm + [RadiusMB4ShieldS3]*sin(180.*deg-[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>     
+    </PosPart>    
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S7P_7"/>
+      <rChild name="Tile1_MB4ShieldYB2S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S7P_7"/>
+      <rChild name="Tile1_MB4ShieldYB2S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S7P_7"/>
+      <rChild name="Tile1_MB4ShieldYB2S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S7P_7"/>
+      <rChild name="Tile1_MB4ShieldYB2S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S7P_7"/>
+      <rChild name="Tile1_MB4ShieldYB2S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S7P_7"/>
+      <rChild name="Tile1_MB4ShieldYB2S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S7P_7"/>
+      <rChild name="Tile2_MB4ShieldYB2S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S7P_7"/>
+      <rChild name="Tile2_MB4ShieldYB2S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S7P_7"/>
+      <rChild name="Tile2_MB4ShieldYB2S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S7P_7"/>
+      <rChild name="Tile2_MB4ShieldYB2S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S7P_7"/>
+      <rChild name="Tile2_MB4ShieldYB2S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S7P_7"/>
+      <rChild name="Tile2_MB4ShieldYB2S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S1   --> 
+    <PosPart copyNumber="1">
+      <rParent name="muonBase:MBWheel_2P"/>
+      <rChild name="MB4ShieldYB2S1P_1"/>
+      <rRotation name="rotations:RM1872"/>
+      <Translation x="-60.0*mm + [RadiusMB4ShieldS3]" y="-320.0*mm + [mb4:MB4BigPos_y]" z="[mbCommon:MBPos_z]"/>     
+    </PosPart>    
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S1P_1"/>
+      <rChild name="Tile1_MB4ShieldYB2S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S1P_1"/>
+      <rChild name="Tile1_MB4ShieldYB2S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S1P_1"/>
+      <rChild name="Tile1_MB4ShieldYB2S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S1P_1"/>
+      <rChild name="Tile1_MB4ShieldYB2S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S1P_1"/>
+      <rChild name="Tile1_MB4ShieldYB2S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S1P_1"/>
+      <rChild name="Tile1_MB4ShieldYB2S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB2S1P_1"/>
+      <rChild name="Tile2_MB4ShieldYB2S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB2S1P_1"/>
+      <rChild name="Tile2_MB4ShieldYB2S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB2S1P_1"/>
+      <rChild name="Tile2_MB4ShieldYB2S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB2S1P_1"/>
+      <rChild name="Tile2_MB4ShieldYB2S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB2S1P_1"/>
+      <rChild name="Tile2_MB4ShieldYB2S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB2S1P_1"/>
+      <rChild name="Tile2_MB4ShieldYB2S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>  
+<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  YB+1  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ --> 
+<!--   S13   --> 
+    <PosPart copyNumber="13">  
+      <rParent name="muonBase:MBWheel_1N"/>
+      <rChild name="MB4ShieldYB1TopN_13"/>
+      <rRotation name="rotations:MM404"/>
+      <Translation x="-[mb4:MB4TopPos_x]" y="[mb4:MB4TopPos_y] + 240.0*mm" z="[mbCommon:MBPos_z]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1TopN_13"/>
+      <rChild name="Tile1_MB4ShieldYB1TopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="[Tile2_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1TopN_13"/>
+      <rChild name="Tile1_MB4ShieldYB1TopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="[Tile2_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1TopN_13"/>
+      <rChild name="Tile1_MB4ShieldYB1TopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="0.0*mm" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1TopN_13"/>
+      <rChild name="Tile1_MB4ShieldYB1TopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="0.0*mm" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1TopN_13"/>
+      <rChild name="Tile1_MB4ShieldYB1TopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="-[Tile2_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1TopN_13"/>
+      <rChild name="Tile1_MB4ShieldYB1TopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="-[Tile2_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1TopN_13"/>
+      <rChild name="Tile2_MB4ShieldYB1TopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="[Tile2_y]*2.0" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1TopN_13"/>
+      <rChild name="Tile2_MB4ShieldYB1TopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="[Tile2_y]*2.0" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1TopN_13"/>
+      <rChild name="Tile2_MB4ShieldYB1TopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="0.0*mm" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1TopN_13"/>
+      <rChild name="Tile2_MB4ShieldYB1TopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="0.0*mm" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1TopN_13"/>
+      <rChild name="Tile2_MB4ShieldYB1TopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="-[Tile2_y]*2.0" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1TopN_13"/>
+      <rChild name="Tile2_MB4ShieldYB1TopN_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="-[Tile2_y]*2.0" z="[CoordZ_3]"/>
+    </PosPart> 
+<!--   S4   -->
+    <PosPart copyNumber="4">  
+      <rParent name="muonBase:MBWheel_1N"/>
+      <rChild name="MB4ShieldYB1TopN_4"/>
+      <rRotation name="rotations:MM404"/>
+      <Translation x="[mb4:MB4TopPos_x]" y="[mb4:MB4TopPos_y] + 240.0*mm" z="[mbCommon:MBPos_z]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1TopN_4"/>
+      <rChild name="Tile1_MB4ShieldYB1TopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="[Tile2_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1TopN_4"/>
+      <rChild name="Tile1_MB4ShieldYB1TopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="[Tile2_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1TopN_4"/>
+      <rChild name="Tile1_MB4ShieldYB1TopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="0.0*mm" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1TopN_4"/>
+      <rChild name="Tile1_MB4ShieldYB1TopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="0.0*mm" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1TopN_4"/>
+      <rChild name="Tile1_MB4ShieldYB1TopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="-[Tile2_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1TopN_4"/>
+      <rChild name="Tile1_MB4ShieldYB1TopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="-[Tile2_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1TopN_4"/>
+      <rChild name="Tile2_MB4ShieldYB1TopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="[Tile2_y]*2.0" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1TopN_4"/>
+      <rChild name="Tile2_MB4ShieldYB1TopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="[Tile2_y]*2.0" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1TopN_4"/>
+      <rChild name="Tile2_MB4ShieldYB1TopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="0.0*mm" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1TopN_4"/>
+      <rChild name="Tile2_MB4ShieldYB1TopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="0.0*mm" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1TopN_4"/>
+      <rChild name="Tile2_MB4ShieldYB1TopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="-[Tile2_y]*2.0" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1TopN_4"/>
+      <rChild name="Tile2_MB4ShieldYB1TopN_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="-[Tile2_y]*2.0" z="[CoordZ_3]"/>
+    </PosPart>  
+<!--   S3   --> 
+    <PosPart copyNumber="3">
+      <rParent name="muonBase:MBWheel_1N"/>
+      <rChild name="MB4ShieldYB1S3N_3"/>
+      <rRotation name="rotations:MM403"/>
+      <Translation x="270.0*mm + [RadiusMB4ShieldS3]*cos(60.*deg+[mb4:MB4BigPosAngle])" y="-150.0*mm + [RadiusMB4ShieldS3]*sin(60.*deg+[mb4:MB4BigPosAngle])" z="-[mbCommon:MBPos_z]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S3N_3"/>
+      <rChild name="Tile1_MB4ShieldYB1S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S3N_3"/>
+      <rChild name="Tile1_MB4ShieldYB1S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S3N_3"/>
+      <rChild name="Tile1_MB4ShieldYB1S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S3N_3"/>
+      <rChild name="Tile1_MB4ShieldYB1S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S3N_3"/>
+      <rChild name="Tile1_MB4ShieldYB1S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S3N_3"/>
+      <rChild name="Tile1_MB4ShieldYB1S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S3N_3"/>
+      <rChild name="Tile2_MB4ShieldYB1S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S3N_3"/>
+      <rChild name="Tile2_MB4ShieldYB1S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S3N_3"/>
+      <rChild name="Tile2_MB4ShieldYB1S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S3N_3"/>
+      <rChild name="Tile2_MB4ShieldYB1S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S3N_3"/>
+      <rChild name="Tile2_MB4ShieldYB1S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S3N_3"/>
+      <rChild name="Tile2_MB4ShieldYB1S3N_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>  
+<!--   S5   --> 
+    <PosPart copyNumber="5">
+      <rParent name="muonBase:MBWheel_1N"/>
+      <rChild name="MB4ShieldYB1S5N_5"/>
+      <rRotation name="rotations:MM405"/>
+      <Translation x="-270.0*mm + [RadiusMB4ShieldS3]*cos(120.*deg-[mb4:MB4BigPosAngle])" y="-150.0*mm + [RadiusMB4ShieldS3]*sin(120.*deg-[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>          
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S5N_5"/>
+      <rChild name="Tile1_MB4ShieldYB1S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S5N_5"/>
+      <rChild name="Tile1_MB4ShieldYB1S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S5N_5"/>
+      <rChild name="Tile1_MB4ShieldYB1S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S5N_5"/>
+      <rChild name="Tile1_MB4ShieldYB1S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S5N_5"/>
+      <rChild name="Tile1_MB4ShieldYB1S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S5N_5"/>
+      <rChild name="Tile1_MB4ShieldYB1S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S5N_5"/>
+      <rChild name="Tile2_MB4ShieldYB1S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S5N_5"/>
+      <rChild name="Tile2_MB4ShieldYB1S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S5N_5"/>
+      <rChild name="Tile2_MB4ShieldYB1S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S5N_5"/>
+      <rChild name="Tile2_MB4ShieldYB1S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S5N_5"/>
+      <rChild name="Tile2_MB4ShieldYB1S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S5N_5"/>
+      <rChild name="Tile2_MB4ShieldYB1S5N_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+<!--   S2   --> 
+    <PosPart copyNumber="2">
+      <rParent name="muonBase:MBWheel_1N"/>
+      <rChild name="MB4ShieldYB1S2N_2"/>
+      <rRotation name="rotations:MM402"/>
+      <Translation x="150.0*mm + [RadiusMB4ShieldS3]*cos(30.*deg+[mb4:MB4BigPosAngle])" y="-260.0*mm + [RadiusMB4ShieldS3]*sin(30.*deg+[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>          
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S2N_2"/>
+      <rChild name="Tile1_MB4ShieldYB1S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S2N_2"/>
+      <rChild name="Tile1_MB4ShieldYB1S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S2N_2"/>
+      <rChild name="Tile1_MB4ShieldYB1S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S2N_2"/>
+      <rChild name="Tile1_MB4ShieldYB1S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S2N_2"/>
+      <rChild name="Tile1_MB4ShieldYB1S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S2N_2"/>
+      <rChild name="Tile1_MB4ShieldYB1S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S2N_2"/>
+      <rChild name="Tile2_MB4ShieldYB1S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S2N_2"/>
+      <rChild name="Tile2_MB4ShieldYB1S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S2N_2"/>
+      <rChild name="Tile2_MB4ShieldYB1S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S2N_2"/>
+      <rChild name="Tile2_MB4ShieldYB1S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S2N_2"/>
+      <rChild name="Tile2_MB4ShieldYB1S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S2N_2"/>
+      <rChild name="Tile2_MB4ShieldYB1S2N_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S6   --> 
+    <PosPart copyNumber="6">
+      <rParent name="muonBase:MBWheel_1N"/>
+      <rChild name="MB4ShieldYB1S6N_6"/>
+      <rRotation name="rotations:MM406"/>
+      <Translation x="-150.0*mm + [RadiusMB4ShieldS3]*cos(150.*deg-[mb4:MB4BigPosAngle])" y="-260.0*mm + [RadiusMB4ShieldS3]*sin(150.*deg-[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>          
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S6N_6"/>
+      <rChild name="Tile1_MB4ShieldYB1S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S6N_6"/>
+      <rChild name="Tile1_MB4ShieldYB1S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S6N_6"/>
+      <rChild name="Tile1_MB4ShieldYB1S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S6N_6"/>
+      <rChild name="Tile1_MB4ShieldYB1S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S6N_6"/>
+      <rChild name="Tile1_MB4ShieldYB1S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S6N_6"/>
+      <rChild name="Tile1_MB4ShieldYB1S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S6N_6"/>
+      <rChild name="Tile2_MB4ShieldYB1S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S6N_6"/>
+      <rChild name="Tile2_MB4ShieldYB1S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S6N_6"/>
+      <rChild name="Tile2_MB4ShieldYB1S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S6N_6"/>
+      <rChild name="Tile2_MB4ShieldYB1S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S6N_6"/>
+      <rChild name="Tile2_MB4ShieldYB1S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S6N_6"/>
+      <rChild name="Tile2_MB4ShieldYB1S6N_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S7   --> 
+    <PosPart copyNumber="7">
+      <rParent name="muonBase:MBWheel_1N"/>
+      <rChild name="MB4ShieldYB1S7N_7"/>
+      <rRotation name="rotations:MM407"/>
+      <Translation x="[RadiusMB4ShieldS3]*cos(180.*deg-[mb4:MB4BigPosAngle])" y="-310.0*mm + [RadiusMB4ShieldS3]*sin(180.*deg-[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>          
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S7N_7"/>
+      <rChild name="Tile1_MB4ShieldYB1S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S7N_7"/>
+      <rChild name="Tile1_MB4ShieldYB1S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S7N_7"/>
+      <rChild name="Tile1_MB4ShieldYB1S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S7N_7"/>
+      <rChild name="Tile1_MB4ShieldYB1S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S7N_7"/>
+      <rChild name="Tile1_MB4ShieldYB1S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S7N_7"/>
+      <rChild name="Tile1_MB4ShieldYB1S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S7N_7"/>
+      <rChild name="Tile2_MB4ShieldYB1S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S7N_7"/>
+      <rChild name="Tile2_MB4ShieldYB1S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S7N_7"/>
+      <rChild name="Tile2_MB4ShieldYB1S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S7N_7"/>
+      <rChild name="Tile2_MB4ShieldYB1S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S7N_7"/>
+      <rChild name="Tile2_MB4ShieldYB1S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S7N_7"/>
+      <rChild name="Tile2_MB4ShieldYB1S7N_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+<!--   S1  --> 
+    <PosPart copyNumber="1">
+      <rParent name="muonBase:MBWheel_1N"/>
+      <rChild name="MB4ShieldYB1S1N_1"/>
+      <rRotation name="rotations:MM401"/>
+      <Translation x="-60.0*mm + [RadiusMB4ShieldS3]" y="-320.0*mm + [mb4:MB4BigPos_y]" z="[mbCommon:MBPos_z]"/>          
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S1N_1"/>
+      <rChild name="Tile1_MB4ShieldYB1S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S1N_1"/>
+      <rChild name="Tile1_MB4ShieldYB1S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S1N_1"/>
+      <rChild name="Tile1_MB4ShieldYB1S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S1N_1"/>
+      <rChild name="Tile1_MB4ShieldYB1S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S1N_1"/>
+      <rChild name="Tile1_MB4ShieldYB1S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S1N_1"/>
+      <rChild name="Tile1_MB4ShieldYB1S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S1N_1"/>
+      <rChild name="Tile2_MB4ShieldYB1S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S1N_1"/>
+      <rChild name="Tile2_MB4ShieldYB1S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S1N_1"/>
+      <rChild name="Tile2_MB4ShieldYB1S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S1N_1"/>
+      <rChild name="Tile2_MB4ShieldYB1S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S1N_1"/>
+      <rChild name="Tile2_MB4ShieldYB1S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S1N_1"/>
+      <rChild name="Tile2_MB4ShieldYB1S1N_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  YB+1  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ --> 
+<!--   S13   --> 
+    <PosPart copyNumber="13">  
+      <rParent name="muonBase:MBWheel_1P"/>
+      <rChild name="MB4ShieldYB1TopP_13"/>
+      <rRotation name="rotations:MM404"/>
+      <Translation x="-[mb4:MB4TopPos_x]" y="[mb4:MB4TopPos_y] + 240.0*mm" z="[mbCommon:MBPos_z]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1TopP_13"/>
+      <rChild name="Tile1_MB4ShieldYB1TopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="[Tile2_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1TopP_13"/>
+      <rChild name="Tile1_MB4ShieldYB1TopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="[Tile2_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1TopP_13"/>
+      <rChild name="Tile1_MB4ShieldYB1TopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="0.0*mm" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1TopP_13"/>
+      <rChild name="Tile1_MB4ShieldYB1TopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="0.0*mm" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1TopP_13"/>
+      <rChild name="Tile1_MB4ShieldYB1TopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="-[Tile2_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1TopP_13"/>
+      <rChild name="Tile1_MB4ShieldYB1TopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="-[Tile2_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1TopP_13"/>
+      <rChild name="Tile2_MB4ShieldYB1TopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="[Tile2_y]*2.0" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1TopP_13"/>
+      <rChild name="Tile2_MB4ShieldYB1TopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="[Tile2_y]*2.0" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1TopP_13"/>
+      <rChild name="Tile2_MB4ShieldYB1TopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="0.0*mm" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1TopP_13"/>
+      <rChild name="Tile2_MB4ShieldYB1TopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="0.0*mm" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1TopP_13"/>
+      <rChild name="Tile2_MB4ShieldYB1TopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="-[Tile2_y]*2.0" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1TopP_13"/>
+      <rChild name="Tile2_MB4ShieldYB1TopP_13"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="-[Tile2_y]*2.0" z="[CoordZ_3]"/>
+    </PosPart> 
+<!--   S4   -->
+    <PosPart copyNumber="4">  
+      <rParent name="muonBase:MBWheel_1P"/>
+      <rChild name="MB4ShieldYB1TopP_4"/>
+      <rRotation name="rotations:MM404"/>
+      <Translation x="[mb4:MB4TopPos_x]" y="[mb4:MB4TopPos_y] + 240.0*mm" z="[mbCommon:MBPos_z]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1TopP_4"/>
+      <rChild name="Tile1_MB4ShieldYB1TopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="[Tile2_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1TopP_4"/>
+      <rChild name="Tile1_MB4ShieldYB1TopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="[Tile2_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1TopP_4"/>
+      <rChild name="Tile1_MB4ShieldYB1TopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="0.0*mm" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1TopP_4"/>
+      <rChild name="Tile1_MB4ShieldYB1TopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="0.0*mm" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1TopP_4"/>
+      <rChild name="Tile1_MB4ShieldYB1TopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="-[Tile2_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1TopP_4"/>
+      <rChild name="Tile1_MB4ShieldYB1TopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="-[Tile2_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1TopP_4"/>
+      <rChild name="Tile2_MB4ShieldYB1TopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="[Tile2_y]*2.0" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1TopP_4"/>
+      <rChild name="Tile2_MB4ShieldYB1TopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="[Tile2_y]*2.0" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1TopP_4"/>
+      <rChild name="Tile2_MB4ShieldYB1TopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="0.0*mm" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1TopP_4"/>
+      <rChild name="Tile2_MB4ShieldYB1TopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="0.0*mm" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1TopP_4"/>
+      <rChild name="Tile2_MB4ShieldYB1TopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile2_x]" y="-[Tile2_y]*2.0" z="[CoordZ_3]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1TopP_4"/>
+      <rChild name="Tile2_MB4ShieldYB1TopP_4"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile2_x]" y="-[Tile2_y]*2.0" z="[CoordZ_3]"/>
+    </PosPart>
+<!--   S3  --> 
+    <PosPart copyNumber="3">
+      <rParent name="muonBase:MBWheel_1P"/>
+      <rChild name="MB4ShieldYB1S3P_3"/>
+      <rRotation name="rotations:RM1892"/>
+      <Translation x="270.0*mm + [RadiusMB4ShieldS3]*cos(60.*deg+[mb4:MB4BigPosAngle])" y="-150.0*mm + [RadiusMB4ShieldS3]*sin(60.*deg+[mb4:MB4BigPosAngle])" z="-[mbCommon:MBPos_z]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S3P_3"/>
+      <rChild name="Tile1_MB4ShieldYB1S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S3P_3"/>
+      <rChild name="Tile1_MB4ShieldYB1S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S3P_3"/>
+      <rChild name="Tile1_MB4ShieldYB1S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S3P_3"/>
+      <rChild name="Tile1_MB4ShieldYB1S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S3P_3"/>
+      <rChild name="Tile1_MB4ShieldYB1S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S3P_3"/>
+      <rChild name="Tile1_MB4ShieldYB1S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S3P_3"/>
+      <rChild name="Tile2_MB4ShieldYB1S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S3P_3"/>
+      <rChild name="Tile2_MB4ShieldYB1S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S3P_3"/>
+      <rChild name="Tile2_MB4ShieldYB1S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S3P_3"/>
+      <rChild name="Tile2_MB4ShieldYB1S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S3P_3"/>
+      <rChild name="Tile2_MB4ShieldYB1S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S3P_3"/>
+      <rChild name="Tile2_MB4ShieldYB1S3P_3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S5  --> 
+    <PosPart copyNumber="5">
+      <rParent name="muonBase:MBWheel_1P"/>
+      <rChild name="MB4ShieldYB1S5P_5"/>
+      <rRotation name="rotations:RM1912"/>
+      <Translation x="-270.0*mm + [RadiusMB4ShieldS3]*cos(120.*deg-[mb4:MB4BigPosAngle])" y="-150.0*mm + [RadiusMB4ShieldS3]*sin(120.*deg-[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>              </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S5P_5"/>
+      <rChild name="Tile1_MB4ShieldYB1S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S5P_5"/>
+      <rChild name="Tile1_MB4ShieldYB1S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S5P_5"/>
+      <rChild name="Tile1_MB4ShieldYB1S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S5P_5"/>
+      <rChild name="Tile1_MB4ShieldYB1S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S5P_5"/>
+      <rChild name="Tile1_MB4ShieldYB1S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S5P_5"/>
+      <rChild name="Tile1_MB4ShieldYB1S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S5P_5"/>
+      <rChild name="Tile2_MB4ShieldYB1S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S5P_5"/>
+      <rChild name="Tile2_MB4ShieldYB1S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S5P_5"/>
+      <rChild name="Tile2_MB4ShieldYB1S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S5P_5"/>
+      <rChild name="Tile2_MB4ShieldYB1S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S5P_5"/>
+      <rChild name="Tile2_MB4ShieldYB1S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S5P_5"/>
+      <rChild name="Tile2_MB4ShieldYB1S5P_5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S2  --> 
+    <PosPart copyNumber="2">
+      <rParent name="muonBase:MBWheel_1P"/>
+      <rChild name="MB4ShieldYB1S2P_2"/>
+      <rRotation name="rotations:RM1882"/>
+      <Translation x="150.0*mm + [RadiusMB4ShieldS3]*cos(30.*deg+[mb4:MB4BigPosAngle])" y="-260.0*mm + [RadiusMB4ShieldS3]*sin(30.*deg+[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>                  </PosPart>        
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S2P_2"/>
+      <rChild name="Tile1_MB4ShieldYB1S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S2P_2"/>
+      <rChild name="Tile1_MB4ShieldYB1S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S2P_2"/>
+      <rChild name="Tile1_MB4ShieldYB1S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S2P_2"/>
+      <rChild name="Tile1_MB4ShieldYB1S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S2P_2"/>
+      <rChild name="Tile1_MB4ShieldYB1S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S2P_2"/>
+      <rChild name="Tile1_MB4ShieldYB1S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S2P_2"/>
+      <rChild name="Tile2_MB4ShieldYB1S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S2P_2"/>
+      <rChild name="Tile2_MB4ShieldYB1S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S2P_2"/>
+      <rChild name="Tile2_MB4ShieldYB1S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S2P_2"/>
+      <rChild name="Tile2_MB4ShieldYB1S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S2P_2"/>
+      <rChild name="Tile2_MB4ShieldYB1S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S2P_2"/>
+      <rChild name="Tile2_MB4ShieldYB1S2P_2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S6  --> 
+    <PosPart copyNumber="6">
+      <rParent name="muonBase:MBWheel_1P"/>
+      <rChild name="MB4ShieldYB1S6P_6"/>
+      <rRotation name="rotations:RM1922"/>
+      <Translation x="-150.0*mm + [RadiusMB4ShieldS3]*cos(150.*deg-[mb4:MB4BigPosAngle])" y="-260.0*mm + [RadiusMB4ShieldS3]*sin(150.*deg-[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>               </PosPart>        
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S6P_6"/>
+      <rChild name="Tile1_MB4ShieldYB1S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S6P_6"/>
+      <rChild name="Tile1_MB4ShieldYB1S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S6P_6"/>
+      <rChild name="Tile1_MB4ShieldYB1S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S6P_6"/>
+      <rChild name="Tile1_MB4ShieldYB1S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S6P_6"/>
+      <rChild name="Tile1_MB4ShieldYB1S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S6P_6"/>
+      <rChild name="Tile1_MB4ShieldYB1S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S6P_6"/>
+      <rChild name="Tile2_MB4ShieldYB1S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S6P_6"/>
+      <rChild name="Tile2_MB4ShieldYB1S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S6P_6"/>
+      <rChild name="Tile2_MB4ShieldYB1S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S6P_6"/>
+      <rChild name="Tile2_MB4ShieldYB1S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S6P_6"/>
+      <rChild name="Tile2_MB4ShieldYB1S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S6P_6"/>
+      <rChild name="Tile2_MB4ShieldYB1S6P_6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S7  --> 
+    <PosPart copyNumber="7">
+      <rParent name="muonBase:MBWheel_1P"/>
+      <rChild name="MB4ShieldYB1S7P_7"/>
+      <rRotation name="rotations:90XD"/>
+      <Translation x="[RadiusMB4ShieldS3]*cos(180.*deg-[mb4:MB4BigPosAngle])" y="-310.0*mm + [RadiusMB4ShieldS3]*sin(180.*deg-[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>               
+    </PosPart>        
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S7P_7"/>
+      <rChild name="Tile1_MB4ShieldYB1S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S7P_7"/>
+      <rChild name="Tile1_MB4ShieldYB1S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S7P_7"/>
+      <rChild name="Tile1_MB4ShieldYB1S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S7P_7"/>
+      <rChild name="Tile1_MB4ShieldYB1S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S7P_7"/>
+      <rChild name="Tile1_MB4ShieldYB1S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S7P_7"/>
+      <rChild name="Tile1_MB4ShieldYB1S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S7P_7"/>
+      <rChild name="Tile2_MB4ShieldYB1S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S7P_7"/>
+      <rChild name="Tile2_MB4ShieldYB1S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S7P_7"/>
+      <rChild name="Tile2_MB4ShieldYB1S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S7P_7"/>
+      <rChild name="Tile2_MB4ShieldYB1S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S7P_7"/>
+      <rChild name="Tile2_MB4ShieldYB1S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S7P_7"/>
+      <rChild name="Tile2_MB4ShieldYB1S7P_7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S1  --> 
+    <PosPart copyNumber="1">
+      <rParent name="muonBase:MBWheel_1P"/>
+      <rChild name="MB4ShieldYB1S1P_1"/>
+      <rRotation name="rotations:RM1872"/>
+      <Translation x="-60.0*mm + [RadiusMB4ShieldS3]" y="-320.0*mm + [mb4:MB4BigPos_y]" z="[mbCommon:MBPos_z]"/>               
+    </PosPart>        
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S1P_1"/>
+      <rChild name="Tile1_MB4ShieldYB1S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S1P_1"/>
+      <rChild name="Tile1_MB4ShieldYB1S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S1P_1"/>
+      <rChild name="Tile1_MB4ShieldYB1S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S1P_1"/>
+      <rChild name="Tile1_MB4ShieldYB1S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S1P_1"/>
+      <rChild name="Tile1_MB4ShieldYB1S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S1P_1"/>
+      <rChild name="Tile1_MB4ShieldYB1S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB1S1P_1"/>
+      <rChild name="Tile2_MB4ShieldYB1S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB1S1P_1"/>
+      <rChild name="Tile2_MB4ShieldYB1S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB1S1P_1"/>
+      <rChild name="Tile2_MB4ShieldYB1S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="-[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="4">  
+      <rParent name="MB4ShieldYB1S1P_1"/>
+      <rChild name="Tile2_MB4ShieldYB1S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="5">  
+      <rParent name="MB4ShieldYB1S1P_1"/>
+      <rChild name="Tile2_MB4ShieldYB1S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="6">  
+      <rParent name="MB4ShieldYB1S1P_1"/>
+      <rChild name="Tile2_MB4ShieldYB1S1P_1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="[Tile3_x]" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  YB0  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ --> 
+<!--   S3  --> 
+    <PosPart copyNumber="3">
+      <rParent name="muonBase:MBWheel_0"/>
+      <rChild name="MB4ShieldYB0S3"/>
+      <rRotation name="rotations:RM1892"/>
+      <Translation x="1020.0*mm + [RadiusMB4ShieldS3]*cos(60.*deg+[mb4:MB4BigPosAngle])" y="-580.0*mm + [RadiusMB4ShieldS3]*sin(60.*deg+[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB0S3"/>
+      <rChild name="Tile1_MB4ShieldYB0S3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB0S3"/>
+      <rChild name="Tile1_MB4ShieldYB0S3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB0S3"/>
+      <rChild name="Tile1_MB4ShieldYB0S3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB0S3"/>
+      <rChild name="Tile2_MB4ShieldYB0S3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*m" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB0S3"/>
+      <rChild name="Tile2_MB4ShieldYB0S3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB0S3"/>
+      <rChild name="Tile2_MB4ShieldYB0S3"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>
+<!--   S5   --> 
+    <PosPart copyNumber="5">
+      <rParent name="muonBase:MBWheel_0"/>
+      <rChild name="MB4ShieldYB0S5"/>
+      <rRotation name="rotations:MM405"/>
+      <Translation x="-1020.00*mm + [RadiusMB4ShieldS3]*cos(120.*deg-[mb4:MB4BigPosAngle])" y="-580.0*mm + [RadiusMB4ShieldS3]*sin(120.*deg-[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB0S5"/>
+      <rChild name="Tile1_MB4ShieldYB0S5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB0S5"/>
+      <rChild name="Tile1_MB4ShieldYB0S5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB0S5"/>
+      <rChild name="Tile1_MB4ShieldYB0S5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB0S5"/>
+      <rChild name="Tile2_MB4ShieldYB0S5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*m" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB0S5"/>
+      <rChild name="Tile2_MB4ShieldYB0S5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB0S5"/>
+      <rChild name="Tile2_MB4ShieldYB0S5"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+<!--   S2  --> 
+    <PosPart copyNumber="2">
+      <rParent name="muonBase:MBWheel_0"/>
+      <rChild name="MB4ShieldYB0S2"/>
+      <rRotation name="rotations:RM1882"/>
+      <Translation x="595.0*mm + [RadiusMB4ShieldS3]*cos(30.*deg+[mb4:MB4BigPosAngle])" y="-1030.0*mm + [RadiusMB4ShieldS3]*sin(30.*deg+[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB0S2"/>
+      <rChild name="Tile1_MB4ShieldYB0S2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB0S2"/>
+      <rChild name="Tile1_MB4ShieldYB0S2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB0S2"/>
+      <rChild name="Tile1_MB4ShieldYB0S2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB0S2"/>
+      <rChild name="Tile2_MB4ShieldYB0S2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*m" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB0S2"/>
+      <rChild name="Tile2_MB4ShieldYB0S2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB0S2"/>
+      <rChild name="Tile2_MB4ShieldYB0S2"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+<!--   S6  --> 
+    <PosPart copyNumber="6">
+      <rParent name="muonBase:MBWheel_0"/>
+      <rChild name="MB4ShieldYB0S6"/>
+      <rRotation name="rotations:RM1922"/>
+      <Translation x="-595.0*mm + [RadiusMB4ShieldS3]*cos(150.*deg-[mb4:MB4BigPosAngle])" y="-1030.0*mm + [RadiusMB4ShieldS3]*sin(150.*deg-[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB0S6"/>
+      <rChild name="Tile1_MB4ShieldYB0S6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB0S6"/>
+      <rChild name="Tile1_MB4ShieldYB0S6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB0S6"/>
+      <rChild name="Tile1_MB4ShieldYB0S6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB0S6"/>
+      <rChild name="Tile2_MB4ShieldYB0S6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*m" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB0S6"/>
+      <rChild name="Tile2_MB4ShieldYB0S6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB0S6"/>
+      <rChild name="Tile2_MB4ShieldYB0S6"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+<!--   S1   --> 
+    <PosPart copyNumber="1">
+      <rParent name="muonBase:MBWheel_0"/>
+      <rChild name="MB4ShieldYB0S1"/>
+      <rRotation name="rotations:MM401"/>
+      <Translation x="-60.0*mm + [RadiusMB4ShieldS3]" y="-1200.0*mm + [mb4:MB4BigPos_y]" z="[mbCommon:MBPos_z]"/>     
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB0S1"/>
+      <rChild name="Tile1_MB4ShieldYB0S1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB0S1"/>
+      <rChild name="Tile1_MB4ShieldYB0S1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB0S1"/>
+      <rChild name="Tile1_MB4ShieldYB0S1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB0S1"/>
+      <rChild name="Tile2_MB4ShieldYB0S1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*m" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB0S1"/>
+      <rChild name="Tile2_MB4ShieldYB0S1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB0S1"/>
+      <rChild name="Tile2_MB4ShieldYB0S1"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+<!--   S7  --> 
+    <PosPart copyNumber="7">
+      <rParent name="muonBase:MBWheel_0"/>
+      <rChild name="MB4ShieldYB0S7"/>
+      <rRotation name="rotations:90XD"/>
+      <Translation x="[RadiusMB4ShieldS3]*cos(180.*deg-[mb4:MB4BigPosAngle])" y="-1190.0*mm + [RadiusMB4ShieldS3]*sin(180.*deg-[mb4:MB4BigPosAngle])" z="[mbCommon:MBPos_z]"/>               
+    </PosPart> 
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB0S7"/>
+      <rChild name="Tile1_MB4ShieldYB0S7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB0S7"/>
+      <rChild name="Tile1_MB4ShieldYB0S7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="0.0" z="[CoordZ_1]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB0S7"/>
+      <rChild name="Tile1_MB4ShieldYB0S7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile3_y]*2.0" z="[CoordZ_1]"/>
+    </PosPart>
+    <PosPart copyNumber="1">  
+      <rParent name="MB4ShieldYB0S7"/>
+      <rChild name="Tile2_MB4ShieldYB0S7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*m" y="[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="2">  
+      <rParent name="MB4ShieldYB0S7"/>
+      <rChild name="Tile2_MB4ShieldYB0S7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="0.0" z="[CoordZ_2]"/>
+    </PosPart> 
+    <PosPart copyNumber="3">  
+      <rParent name="MB4ShieldYB0S7"/>
+      <rChild name="Tile2_MB4ShieldYB0S7"/>
+      <rRotation name="rotations:000D"/>
+      <Translation x="0.0*mm" y="-[Tile3_y]*2.0" z="[CoordZ_2]"/>
+    </PosPart>        
+<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ END OF POSITION SECTION ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
+  </PosPartSection>
+</DDDefinition>
+
+