diff --git a/src/main/java/refinedstorage/tile/TileConstructor.java b/src/main/java/refinedstorage/tile/TileConstructor.java
index d361a8502..0165d673f 100755
--- a/src/main/java/refinedstorage/tile/TileConstructor.java
+++ b/src/main/java/refinedstorage/tile/TileConstructor.java
@@ -1,5 +1,6 @@
 package refinedstorage.tile;
 
+import mcmultipart.microblock.IMicroblock;
 import net.minecraft.block.SoundType;
 import net.minecraft.block.state.IBlockState;
 import net.minecraft.item.ItemStack;
@@ -46,6 +47,11 @@ public class TileConstructor extends TileMultipartNode implements IComparable {
         dataManager.addWatchedParameter(COMPARE);
     }
 
+    @Override
+    public boolean canAddMicroblock(IMicroblock microblock) {
+        return !isBlockingMicroblock(microblock, getDirection());
+    }
+
     @Override
     public int getEnergyUsage() {
         return RefinedStorage.INSTANCE.constructorUsage + upgrades.getEnergyUsage();
diff --git a/src/main/java/refinedstorage/tile/TileDestructor.java b/src/main/java/refinedstorage/tile/TileDestructor.java
index 2424d46fc..71651bde3 100755
--- a/src/main/java/refinedstorage/tile/TileDestructor.java
+++ b/src/main/java/refinedstorage/tile/TileDestructor.java
@@ -1,5 +1,6 @@
 package refinedstorage.tile;
 
+import mcmultipart.microblock.IMicroblock;
 import net.minecraft.block.Block;
 import net.minecraft.block.state.IBlockState;
 import net.minecraft.inventory.InventoryHelper;
@@ -40,6 +41,11 @@ public class TileDestructor extends TileMultipartNode implements IComparable, IF
         dataManager.addWatchedParameter(MODE);
     }
 
+    @Override
+    public boolean canAddMicroblock(IMicroblock microblock) {
+        return !isBlockingMicroblock(microblock, getDirection());
+    }
+
     @Override
     public int getEnergyUsage() {
         return RefinedStorage.INSTANCE.destructorUsage + upgrades.getEnergyUsage();
diff --git a/src/main/java/refinedstorage/tile/TileExporter.java b/src/main/java/refinedstorage/tile/TileExporter.java
index 78c66e634..489d505e2 100755
--- a/src/main/java/refinedstorage/tile/TileExporter.java
+++ b/src/main/java/refinedstorage/tile/TileExporter.java
@@ -1,5 +1,6 @@
 package refinedstorage.tile;
 
+import mcmultipart.microblock.IMicroblock;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.util.EnumFacing;
@@ -31,6 +32,11 @@ public class TileExporter extends TileMultipartNode implements IComparable {
         dataManager.addWatchedParameter(COMPARE);
     }
 
+    @Override
+    public boolean canAddMicroblock(IMicroblock microblock) {
+        return !isBlockingMicroblock(microblock, getDirection());
+    }
+
     @Override
     public int getEnergyUsage() {
         return RefinedStorage.INSTANCE.exporterUsage + upgrades.getEnergyUsage();
diff --git a/src/main/java/refinedstorage/tile/TileImporter.java b/src/main/java/refinedstorage/tile/TileImporter.java
index 045dab5bf..0ad6f77f7 100755
--- a/src/main/java/refinedstorage/tile/TileImporter.java
+++ b/src/main/java/refinedstorage/tile/TileImporter.java
@@ -1,5 +1,6 @@
 package refinedstorage.tile;
 
+import mcmultipart.microblock.IMicroblock;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.util.EnumFacing;
@@ -34,6 +35,11 @@ public class TileImporter extends TileMultipartNode implements IComparable, IFil
         dataManager.addWatchedParameter(MODE);
     }
 
+    @Override
+    public boolean canAddMicroblock(IMicroblock microblock) {
+        return !isBlockingMicroblock(microblock, getDirection());
+    }
+
     @Override
     public int getEnergyUsage() {
         return RefinedStorage.INSTANCE.importerUsage + upgrades.getEnergyUsage();
diff --git a/src/main/java/refinedstorage/tile/TileMultipartNode.java b/src/main/java/refinedstorage/tile/TileMultipartNode.java
index 2095975e4..6cdbe3c49 100755
--- a/src/main/java/refinedstorage/tile/TileMultipartNode.java
+++ b/src/main/java/refinedstorage/tile/TileMultipartNode.java
@@ -82,12 +82,8 @@ public abstract class TileMultipartNode extends TileNode implements IMicroblockC
 
         if (tile instanceof TileMultipartNode) {
             for (IMicroblock microblock : ((TileMultipartNode) tile).getMicroblockContainer().getParts()) {
-                if (microblock instanceof IMicroblock.IFaceMicroblock) {
-                    IMicroblock.IFaceMicroblock faceMicroblock = (IMicroblock.IFaceMicroblock) microblock;
-
-                    if (faceMicroblock.getFace() == direction && !faceMicroblock.isFaceHollow()) {
-                        return true;
-                    }
+                if (isBlockingMicroblock(microblock, direction)) {
+                    return true;
                 }
             }
         }
@@ -95,6 +91,16 @@ public abstract class TileMultipartNode extends TileNode implements IMicroblockC
         return false;
     }
 
+    public static boolean isBlockingMicroblock(IMicroblock microblock, EnumFacing direction) {
+        if (!(microblock instanceof IMicroblock.IFaceMicroblock)) {
+            return false;
+        }
+
+        IMicroblock.IFaceMicroblock faceMicroblock = (IMicroblock.IFaceMicroblock) microblock;
+
+        return faceMicroblock.getFace() == direction && !faceMicroblock.isFaceHollow();
+    }
+
     @Override
     public boolean canConduct(EnumFacing direction) {
         return !hasBlockingMicroblock(worldObj, pos, direction) && !hasBlockingMicroblock(worldObj, pos.offset(direction), direction.getOpposite());
diff --git a/src/main/java/refinedstorage/tile/externalstorage/TileExternalStorage.java b/src/main/java/refinedstorage/tile/externalstorage/TileExternalStorage.java
index ba0165c82..b6f740d3d 100755
--- a/src/main/java/refinedstorage/tile/externalstorage/TileExternalStorage.java
+++ b/src/main/java/refinedstorage/tile/externalstorage/TileExternalStorage.java
@@ -2,6 +2,7 @@ package refinedstorage.tile.externalstorage;
 
 import com.jaquadro.minecraft.storagedrawers.api.storage.IDrawer;
 import com.jaquadro.minecraft.storagedrawers.api.storage.IDrawerGroup;
+import mcmultipart.microblock.IMicroblock;
 import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.network.datasync.DataSerializers;
 import net.minecraft.tileentity.TileEntity;
@@ -64,6 +65,11 @@ public class TileExternalStorage extends TileMultipartNode implements IStoragePr
         dataManager.addWatchedParameter(CAPACITY);
     }
 
+    @Override
+    public boolean canAddMicroblock(IMicroblock microblock) {
+        return !isBlockingMicroblock(microblock, getDirection());
+    }
+
     @Override
     public int getEnergyUsage() {
         return RefinedStorage.INSTANCE.externalStorageUsage + (storages.size() * RefinedStorage.INSTANCE.externalStoragePerStorageUsage);