diff --git a/TerraformingBZ/Properties/AssemblyInfo.cs b/TerraformingBZ/Properties/AssemblyInfo.cs
index b1ca7cb..774aeff 100644
--- a/TerraformingBZ/Properties/AssemblyInfo.cs
+++ b/TerraformingBZ/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.4.1.0")]
-[assembly: AssemblyFileVersion("1.4.1.0")]
+[assembly: AssemblyVersion("1.4.2.0")]
+[assembly: AssemblyFileVersion("1.4.2.0")]
diff --git a/TerraformingBZ/mod.json b/TerraformingBZ/mod.json
index 722ecf9..7930ce3 100644
--- a/TerraformingBZ/mod.json
+++ b/TerraformingBZ/mod.json
@@ -2,7 +2,7 @@
     "Id": "TerraformingBZ",
     "DisplayName": "Terraforming Ability for Below Zero",
     "Author": "repkins",
-    "Version": "1.4.1",
+    "Version": "1.4.2",
     "Dependencies": [ ],
     "VersionDependencies": { },
     "LoadBefore": [ ],
diff --git a/TerraformingShared/Tools/BuilderExtensions.cs b/TerraformingShared/Tools/BuilderExtensions.cs
index 95fc43c..99e4358 100644
--- a/TerraformingShared/Tools/BuilderExtensions.cs
+++ b/TerraformingShared/Tools/BuilderExtensions.cs
@@ -9,10 +9,22 @@ internal static class BuilderExtensions
     {
         public static void ClearConstructionObstacles(List<GameObject> results)
         {
-            results.RemoveAll(IsObstacleOf<ConstructionObstacle>);
+            results.RemoveAll(IsContructionObstacle);
+        }
+
+        public static bool IsContructionObstacle(GameObject go)
+        {
+            if (IsObstacleOf<ConstructionObstacle>(go))
+            {
+                return true;
+            }
 #if !BelowZero
-            results.RemoveAll(IsObstacleOf<ImmuneToPropulsioncannon>);
+            if (IsObstacleOf<ImmuneToPropulsioncannon>(go))
+            {
+                return true;
+            }
 #endif
+            return false;
         }
 
         static bool IsObstacleOf<T>(GameObject go)
diff --git a/TerraformingShared/Tools/BuilderToolPatches.cs b/TerraformingShared/Tools/BuilderToolPatches.cs
index 1f4c7eb..5a85ea7 100644
--- a/TerraformingShared/Tools/BuilderToolPatches.cs
+++ b/TerraformingShared/Tools/BuilderToolPatches.cs
@@ -58,10 +58,7 @@ public static void UpdateObstacleSettings()
                     {
                         RestoreHighlightedObstacles();
 
-                        if (Config.Instance.destroyLargerObstaclesOnConstruction)
-                        {
-                            HighlightDestroyableObstacles(constructableBase);
-                        }
+                        HighlightDestroyableObstacles(constructableBase);
                     }
 
                     prevTarget = targetObject;
@@ -105,28 +102,37 @@ public static void OnHolster_Postfix()
 
         static void HighlightDestroyableObstacles(ConstructableBase constructableBase)
         {
-            using (var orientedBoundsListPool = Pool<ListPool<OrientedBounds>>.Get())
+            using (var constructableBoundsListPool = Pool<ListPool<ConstructableBounds>>.Get())
             using (var obstacleListPool = Pool<ListPool<GameObject>>.Get())
+            using (var overlappedObjectsPool = Pool<ListPool<GameObject>>.Get())
             {
-                var orientedBoundsList = orientedBoundsListPool.list;
+                var constructableBoundsList = constructableBoundsListPool.list;
                 var obstacleList = obstacleListPool.list;
+                var overlappedObjects = overlappedObjectsPool.list;
+
+                constructableBase.GetComponentsInChildren(true, constructableBoundsList);
 
-                Builder.CacheBounds(constructableBase.gameObject.transform, constructableBase.gameObject, orientedBoundsList, false);
-                BuilderExtensions.GetObstacles(constructableBase.transform.position, constructableBase.transform.rotation, orientedBoundsList, obstacleList);
+                var orientedBoundsList = constructableBoundsList.Select(constructableBounds => OrientedBounds.ToWorldBounds(constructableBounds.transform, constructableBounds.bounds));
+                foreach (var orientedBounds in orientedBoundsList)
+                {
+                    overlappedObjects.Clear();
+                    Builder.GetOverlappedObjects(orientedBounds.position, orientedBounds.rotation, orientedBounds.extents, overlappedObjects);
+
+                    obstacleList.AddRange(overlappedObjects);
+                }
 
-                Terraforming.Logger.Info($"obstacleList.Count = {obstacleList.Count}");
+                Terraforming.Logger.Debug($"obstacleList.Count = {obstacleList.Count}");
 
                 if (obstacleList.Count > 0)
                 {
-                    using (var materialListPool = Pool<ListPool<Material>>.Get())
                     using (var rendererListPool = Pool<ListPool<Renderer>>.Get())
                     {
-                        var materialList = materialListPool.list;
                         var rendererList = rendererListPool.list;
 
                         foreach (var obstacle in obstacleList)
                         {
-                            if (!(obstacle.GetComponent<BaseCell>() != null) && Builder.CanDestroyObject(obstacle))
+                            if ((Config.Instance.destroyLargerObstaclesOnConstruction || !BuilderExtensions.IsContructionObstacle(obstacle))
+                                && obstacle.GetComponent<BaseCell>() == null && Builder.CanDestroyObject(obstacle))
                             {
                                 obstacle.GetComponentsInChildren(rendererList);