diff --git a/common/buildcraft/core/ItemWrench.java b/common/buildcraft/core/ItemWrench.java
index d74cc438..e2e9ef37 100644
--- a/common/buildcraft/core/ItemWrench.java
+++ b/common/buildcraft/core/ItemWrench.java
@@ -2,6 +2,7 @@ package buildcraft.core;
 
 import net.minecraft.creativetab.CreativeTabs;
 import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.world.World;
 import buildcraft.api.tools.IToolWrench;
 
 public class ItemWrench extends ItemBuildCraft implements IToolWrench {
@@ -19,4 +20,10 @@ public class ItemWrench extends ItemBuildCraft implements IToolWrench {
 	@Override
 	public void wrenchUsed(EntityPlayer player, int x, int y, int z) {
 	}
+
+	@Override
+	public boolean shouldPassSneakingClickToBlock(World par2World, int par4, int par5, int par6)
+	{
+	    return true;
+	}
 }
diff --git a/common/buildcraft/core/inventory/TransactorSimple.java b/common/buildcraft/core/inventory/TransactorSimple.java
index 01bbcc7a..d4dbab17 100644
--- a/common/buildcraft/core/inventory/TransactorSimple.java
+++ b/common/buildcraft/core/inventory/TransactorSimple.java
@@ -68,35 +68,34 @@ public class TransactorSimple extends Transactor {
 	}
 
 	protected int addToSlot(int slot, ItemStack stack, int injected, boolean doAdd) {
-		int remaining = stack.stackSize - injected;
+		int available = stack.stackSize - injected;
+		int max = Math.min(stack.getMaxStackSize(), inventory.getInventoryStackLimit());
 
 		ItemStack stackInSlot = inventory.getStackInSlot(slot);
 		if (stackInSlot == null) {
+			int wanted = Math.min(available, max);
 			if (doAdd) {
 				stackInSlot = stack.copy();
-				stackInSlot.stackSize = remaining;
+				stackInSlot.stackSize = wanted;
 				inventory.setInventorySlotContents(slot, stackInSlot);
 			}
-			return remaining;
+			return wanted;
 		}
 
 		if (!stackInSlot.isItemEqual(stack) || !ItemStack.areItemStackTagsEqual(stackInSlot, stack))
 			return 0;
 
-		int space = stackInSlot.getMaxStackSize() - stackInSlot.stackSize;
-		if (space <= 0)
+		int wanted = max - stackInSlot.stackSize;
+		if (wanted <= 0)
 			return 0;
 
-		if (space >= remaining) {
-			if (doAdd) {
-				stackInSlot.stackSize += remaining;
-			}
-			return remaining;
-		} else {
-			if (doAdd) {
-				stackInSlot.stackSize = stackInSlot.getMaxStackSize();
-			}
-			return space;
+		if (wanted > available)
+			wanted = available;
+
+		if (doAdd) {
+			stackInSlot.stackSize += wanted;
+			inventory.setInventorySlotContents(slot, stackInSlot);
 		}
+		return wanted;
 	}
 }
diff --git a/common/buildcraft/core/utils/InventoryUtil.java b/common/buildcraft/core/utils/InventoryUtil.java
index e955cdf5..ca935a17 100644
--- a/common/buildcraft/core/utils/InventoryUtil.java
+++ b/common/buildcraft/core/utils/InventoryUtil.java
@@ -62,6 +62,7 @@ public class InventoryUtil {
 				int itemsToMove = stack.getMaxStackSize() - stack.stackSize;
 				stack.stackSize += itemsToMove;
 				stackToMove.stackSize -= itemsToMove;
+				_inventory.setInventorySlotContents(i, stackToMove);
 			}
 		}
 		return stackToMove;
diff --git a/common/buildcraft/energy/BlockEngine.java b/common/buildcraft/energy/BlockEngine.java
index 67760330..98c763a1 100644
--- a/common/buildcraft/energy/BlockEngine.java
+++ b/common/buildcraft/energy/BlockEngine.java
@@ -58,6 +58,15 @@ public class BlockEngine extends BlockContainer {
 		return new TileEngine();
 	}
 
+	@Override
+	public boolean isBlockSolidOnSide(World world, int x, int y, int z, ForgeDirection side) {
+		TileEntity tile = world.getBlockTileEntity(x, y, z);
+		if (tile instanceof TileEngine) {
+			return ForgeDirection.getOrientation(((TileEngine) tile).orientation).getOpposite() == side;
+		}
+		return false;
+	}
+
 	@Override
 	public void breakBlock(World world, int x, int y, int z, int par5, int par6) {
 		TileEngine engine = ((TileEngine) world.getBlockTileEntity(x, y, z));
diff --git a/common/buildcraft/energy/TileEngine.java b/common/buildcraft/energy/TileEngine.java
index 285596fa..d1a565ca 100644
--- a/common/buildcraft/energy/TileEngine.java
+++ b/common/buildcraft/energy/TileEngine.java
@@ -71,7 +71,7 @@ public class TileEngine extends TileBuildCraft implements IPowerReceptor, IInven
 				createEngineIfNeeded();
 			}
 
-			engine.orientation = ForgeDirection.values()[orientation];
+			engine.orientation = ForgeDirection.VALID_DIRECTIONS[orientation];
 			provider.configure(0, engine.minEnergyReceived(), engine.maxEnergyReceived(), 1, engine.maxEnergy);
 			checkRedstonePower();
 		}
@@ -170,7 +170,7 @@ public class TileEngine extends TileBuildCraft implements IPowerReceptor, IInven
 
 			engine = newEngine(kind);
 
-			engine.orientation = ForgeDirection.values()[orientation];
+			engine.orientation = ForgeDirection.VALID_DIRECTIONS[orientation];
 			worldObj.notifyBlockChange(xCoord, yCoord, zCoord, BuildCraftEnergy.engineBlock.blockID);
 		}
 	}