diff --git a/src/main/java/com/simibubi/create/modules/contraptions/components/contraptions/Contraption.java b/src/main/java/com/simibubi/create/modules/contraptions/components/contraptions/Contraption.java
index d06f73f8a..6602497c4 100644
--- a/src/main/java/com/simibubi/create/modules/contraptions/components/contraptions/Contraption.java
+++ b/src/main/java/com/simibubi/create/modules/contraptions/components/contraptions/Contraption.java
@@ -4,6 +4,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -519,16 +520,20 @@ public abstract class Contraption {
 		glueToRemove.forEach(SuperGlueEntity::remove);
 
 		for (boolean brittles : Iterate.trueAndFalse) {
-			for (BlockInfo block : blocks.values()) {
+			for (Iterator<BlockInfo> iterator = blocks.values().iterator(); iterator.hasNext();) {
+				BlockInfo block = iterator.next();
 				if (brittles != BlockMovementTraits.isBrittle(block.state))
 					continue;
 
 				BlockPos add = block.pos.add(anchor).add(offset);
 				if (customRemoval.test(add, block.state))
 					continue;
+				Block blockIn = world.getBlockState(add).getBlock();
+				if (block.state.getBlock() != blockIn)
+					iterator.remove();
 				world.getWorld().removeTileEntity(add);
 				int flags = 67;
-				if (world.getBlockState(add).getBlock() instanceof DoorBlock)
+				if (blockIn instanceof DoorBlock)
 					flags = flags | 32 | 16;
 				world.setBlockState(add, Blocks.AIR.getDefaultState(), flags);
 			}
@@ -565,11 +570,15 @@ public abstract class Contraption {
 					state = state.with(SawBlock.RUNNING, false);
 
 				BlockState blockState = world.getBlockState(targetPos);
-				if (blockState.getBlockHardness(world, targetPos) == -1)
-					continue;
-				if (state.getCollisionShape(world, targetPos).isEmpty()
-						&& !blockState.getCollisionShape(world, targetPos).isEmpty())
+				if (blockState.getBlockHardness(world, targetPos) == -1
+						|| (state.getCollisionShape(world, targetPos).isEmpty()
+						&& !blockState.getCollisionShape(world, targetPos).isEmpty())) {
+					if (targetPos.getY() == 0)
+						targetPos = targetPos.up();
+					world.playEvent(2001, targetPos, Block.getStateId(state));
+					Block.spawnDrops(state, world, targetPos, null);
 					continue;
+				}
 
 				world.destroyBlock(targetPos, true);
 				world.setBlockState(targetPos, state, 3 | BlockFlags.IS_MOVING);
diff --git a/src/main/java/com/simibubi/create/modules/contraptions/components/contraptions/glue/SuperGlueEntity.java b/src/main/java/com/simibubi/create/modules/contraptions/components/contraptions/glue/SuperGlueEntity.java
index c4b58507d..5eca4e99b 100644
--- a/src/main/java/com/simibubi/create/modules/contraptions/components/contraptions/glue/SuperGlueEntity.java
+++ b/src/main/java/com/simibubi/create/modules/contraptions/components/contraptions/glue/SuperGlueEntity.java
@@ -13,6 +13,7 @@ import com.simibubi.create.modules.schematics.ISpecialEntityItemRequirement;
 import com.simibubi.create.modules.schematics.ItemRequirement;
 import com.simibubi.create.modules.schematics.ItemRequirement.ItemUseType;
 
+import net.minecraft.block.BlockState;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.entity.player.ClientPlayerEntity;
 import net.minecraft.client.world.ClientWorld;
@@ -164,11 +165,13 @@ public class SuperGlueEntity extends Entity implements IEntityAdditionalSpawnDat
 	}
 
 	public static boolean isValidFace(World world, BlockPos pos, Direction direction) {
+		BlockState state = world.getBlockState(pos);
+		if (BlockMovementTraits.isBlockAttachedTowards(state, direction))
+			return true;
 		if (!BlockMovementTraits.movementNecessary(world, pos))
 			return false;
-		if (BlockMovementTraits.notSupportive(world.getBlockState(pos), direction)) {
+		if (BlockMovementTraits.notSupportive(state, direction))
 			return false;
-		}
 		return true;
 	}
 
diff --git a/src/main/java/com/simibubi/create/modules/contraptions/components/contraptions/glue/SuperGlueRenderer.java b/src/main/java/com/simibubi/create/modules/contraptions/components/contraptions/glue/SuperGlueRenderer.java
index 5765ebcc6..11717232f 100644
--- a/src/main/java/com/simibubi/create/modules/contraptions/components/contraptions/glue/SuperGlueRenderer.java
+++ b/src/main/java/com/simibubi/create/modules/contraptions/components/contraptions/glue/SuperGlueRenderer.java
@@ -83,7 +83,7 @@ public class SuperGlueRenderer extends EntityRenderer<SuperGlueEntity> {
 			return false;
 		BlockPos pos = entity.hangingPosition;
 		BlockPos pos2 = pos.offset(entity.getFacingDirection().getOpposite());
-		return !SuperGlueEntity.isValidFace(entity.world, pos2, entity.getFacingDirection()) || !SuperGlueEntity.isValidFace(entity.world, pos, entity.getFacingDirection().getOpposite());
+		return SuperGlueEntity.isValidFace(entity.world, pos2, entity.getFacingDirection()) != SuperGlueEntity.isValidFace(entity.world, pos, entity.getFacingDirection().getOpposite());
 	}
 
 	private void initQuads() {