diff --git a/src/main/java/refinedstorage/item/ItemWirelessGrid.java b/src/main/java/refinedstorage/item/ItemWirelessGrid.java
index ee37a57fc..4f09f221a 100755
--- a/src/main/java/refinedstorage/item/ItemWirelessGrid.java
+++ b/src/main/java/refinedstorage/item/ItemWirelessGrid.java
@@ -9,6 +9,7 @@ import net.minecraft.item.IItemPropertyGetter;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NBTTagCompound;
+import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.*;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.text.TextComponentString;
@@ -133,12 +134,16 @@ public class ItemWirelessGrid extends ItemEnergyContainer {
     @Override
     public ActionResult<ItemStack> onItemRightClick(ItemStack stack, World world, EntityPlayer player, EnumHand hand) {
         if (!world.isRemote && getDimensionId(stack) == player.dimension) {
-            TileController tile = (TileController) world.getTileEntity(new BlockPos(getX(stack), getY(stack), getZ(stack)));
+            TileEntity tile = world.getTileEntity(new BlockPos(getX(stack), getY(stack), getZ(stack)));
 
-            if (tile.onOpenWirelessGrid(player, hand)) {
-                return new ActionResult(EnumActionResult.SUCCESS, stack);
+            if (tile instanceof TileController) {
+                if (((TileController) tile).onOpenWirelessGrid(player, hand)) {
+                    return new ActionResult(EnumActionResult.SUCCESS, stack);
+                } else {
+                    player.addChatComponentMessage(new TextComponentString(I18n.translateToLocal("misc.refinedstorage:wireless_grid.out_of_range")));
+                }
             } else {
-                player.addChatComponentMessage(new TextComponentString(I18n.translateToLocal("misc.refinedstorage:wireless_grid.out_of_range")));
+                player.addChatComponentMessage(new TextComponentString(I18n.translateToLocal("misc.refinedstorage:wireless_grid.not_found")));
             }
         }
 
diff --git a/src/main/java/refinedstorage/tile/TileController.java b/src/main/java/refinedstorage/tile/TileController.java
index f2d77a587..c8d696faa 100755
--- a/src/main/java/refinedstorage/tile/TileController.java
+++ b/src/main/java/refinedstorage/tile/TileController.java
@@ -567,7 +567,7 @@ public class TileController extends TileBase implements IEnergyReceiver, INetwor
     }
 
     public void handleStoragePull(int id, int flags, EntityPlayerMP player) {
-        if (id < 0 || id >= itemGroups.size() - 1) {
+        if (id < 0 || id > itemGroups.size() - 1) {
             return;
         }
 
diff --git a/src/main/resources/assets/refinedstorage/lang/en_US.lang b/src/main/resources/assets/refinedstorage/lang/en_US.lang
index 18c3b9b1f..de0b5da8a 100755
--- a/src/main/resources/assets/refinedstorage/lang/en_US.lang
+++ b/src/main/resources/assets/refinedstorage/lang/en_US.lang
@@ -37,6 +37,7 @@ misc.refinedstorage:wireless_grid.tooltip.0=X: %d
 misc.refinedstorage:wireless_grid.tooltip.1=Y: %d
 misc.refinedstorage:wireless_grid.tooltip.2=Z: %d
 misc.refinedstorage:wireless_grid.out_of_range=Controller out of range.
+misc.refinedstorage:wireless_grid.not_found=Controller not found.
 
 misc.refinedstorage:yes=Yes
 misc.refinedstorage:no=No
diff --git a/src/main/resources/assets/refinedstorage/lang/nl_NL.lang b/src/main/resources/assets/refinedstorage/lang/nl_NL.lang
index 9b04995b5..dfba46e42 100755
--- a/src/main/resources/assets/refinedstorage/lang/nl_NL.lang
+++ b/src/main/resources/assets/refinedstorage/lang/nl_NL.lang
@@ -37,6 +37,7 @@ misc.refinedstorage:wireless_grid.tooltip.0=X: %d
 misc.refinedstorage:wireless_grid.tooltip.1=Y: %d
 misc.refinedstorage:wireless_grid.tooltip.2=Z: %d
 misc.refinedstorage:wireless_grid.out_of_range=Controller buiten bereik.
+misc.refinedstorage:wireless_grid.not_found=Controller niet gevonden.
 
 misc.refinedstorage:yes=Ja
 misc.refinedstorage:no=Nee