diff --git a/CombineAIDriver.lua b/CombineAIDriver.lua
index 00c5342c5..ff57c8780 100644
--- a/CombineAIDriver.lua
+++ b/CombineAIDriver.lua
@@ -1499,20 +1499,24 @@ end
 
 --- Make life easier for unloaders, increases reach of the pipe
 function CombineAIDriver:fixMaxRotationLimit()
-	local LastPipeNode = self.pipe.nodes and self.pipe.nodes[#self.pipe.nodes]
-	if self:isChopper() and LastPipeNode and LastPipeNode.maxRotationLimits then
-		self.oldLastPipeNodeMaxRotationLimit = LastPipeNode.maxRotationLimits
-        self:debug('Chopper fix maxRotationLimits, old Values: x=%s, y= %s, z =%s', tostring(LastPipeNode.maxRotationLimits[1]), tostring(LastPipeNode.maxRotationLimits[2]), tostring(LastPipeNode.maxRotationLimits[3]))
-        LastPipeNode.maxRotationLimits = nil   
-    end
+	if self.pipe then
+		local lastPipeNode = self.pipe.nodes and self.pipe.nodes[#self.pipe.nodes]
+		if self:isChopper() and lastPipeNode and lastPipeNode.maxRotationLimits then
+			self.oldLastPipeNodeMaxRotationLimit = lastPipeNode.maxRotationLimits
+			self:debug('Chopper fix maxRotationLimits, old Values: x=%s, y= %s, z =%s', tostring(lastPipeNode.maxRotationLimits[1]), tostring(lastPipeNode.maxRotationLimits[2]), tostring(lastPipeNode.maxRotationLimits[3]))
+			lastPipeNode.maxRotationLimits = nil
+		end
+	end
 end
 
 function CombineAIDriver:resetFixMaxRotationLimit()
-	local LastPipeNode = self.pipe.nodes and self.pipe.nodes[#self.pipe.nodes]
-	if LastPipeNode and self.oldLastPipeNodeMaxRotationLimit then 
-		LastPipeNode.maxRotationLimits = self.oldLastPipeNodeMaxRotationLimit
-		self:debug('Chopper: reset maxRotationLimits is x=%s, y= %s, z =%s', tostring(LastPipeNode.maxRotationLimits[1]), tostring(LastPipeNode.maxRotationLimits[3]), tostring(LastPipeNode.maxRotationLimits[3]))
-		self.oldLastPipeNodeMaxRotationLimit = nil
+	if self.pipe then
+		local lastPipeNode = self.pipe.nodes and self.pipe.nodes[#self.pipe.nodes]
+		if lastPipeNode and self.oldLastPipeNodeMaxRotationLimit then
+			lastPipeNode.maxRotationLimits = self.oldLastPipeNodeMaxRotationLimit
+			self:debug('Chopper: reset maxRotationLimits is x=%s, y= %s, z =%s', tostring(lastPipeNode.maxRotationLimits[1]), tostring(lastPipeNode.maxRotationLimits[3]), tostring(lastPipeNode.maxRotationLimits[3]))
+			self.oldLastPipeNodeMaxRotationLimit = nil
+		end
 	end
 end
 
diff --git a/config/VehicleConfigurations.xml b/config/VehicleConfigurations.xml
index 4065adb69..78187f957 100644
--- a/config/VehicleConfigurations.xml
+++ b/config/VehicleConfigurations.xml
@@ -162,6 +162,15 @@ You can define the following custom settings:
     />
     <!--[MODS]-->
 
+	<!--Mod: KOECKERLING Vector 460-->
+	<Vehicle name="vector460.xml"
+			 implementWheelAlwaysOnGround = "true"
+	/>
+	<!--Mod: KOECKERLING Vector 620-->
+	<Vehicle name="vector620.xml"
+			 implementWheelAlwaysOnGround = "true"
+	/>
+
     <!--Harvester-->
 
     <!--Implements-->
diff --git a/modDesc.xml b/modDesc.xml
index 776aa7443..8ddc4b35e 100644
--- a/modDesc.xml
+++ b/modDesc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8" standalone="no" ?>
 <modDesc descVersion="47">
-	<version>6.03.00039</version>
+	<version>6.03.00040</version>
 	<author><![CDATA[Courseplay.devTeam]]></author>
 	<title><!-- en=English de=German fr=French es=Spanish ru=Russian pl=Polish it=Italian br=Brazilian-Portuguese cs=Chinese(Simplified) ct=Chinese(Traditional) cz=Czech nl=Netherlands hu=Hungary jp=Japanese kr=Korean pt=Portuguese ro=Romanian tr=Turkish -->
 		<en>CoursePlay SIX</en>