public void drawScreen(int par1, int par2, float par3) {
   super.drawScreen(par1, par2, par3);
   boolean op = false; // TODO: Check if player is OP
   if (Keyboard.isKeyDown(Keyboard.KEY_O) && op) {
     player.openGui(ModUncrafting.instance, 1, worldObj, x, y, z);
   }
 }
  @Override
  public boolean onBlockActivated(
      World world,
      int x,
      int y,
      int z,
      EntityPlayer entityplayer,
      int side,
      float hitX,
      float hitY,
      float hitZ) {
    super.onBlockActivated(world, x, y, z, entityplayer, side, hitX, hitY, hitZ);
    TileEntityQuern te = (TileEntityQuern) world.getBlockTileEntity(x, y, z);
    if (!world.isRemote) {
      if (!te.shouldRotate && hitX >= 0.65 && hitZ >= 0.65 && te.storage[2] != null) {
        te.shouldRotate = true;
        world.playSoundEffect(x, y, z, TFC_Sounds.STONEDRAG, 1, 1);
      } else if ((!te.shouldRotate && (hitX < 0.65 || hitZ < 0.65)) || te.storage[2] == null) {
        entityplayer.openGui(TerraFirmaCraft.instance, 33, world, x, y, z);
      }
    } else if (!te.shouldRotate && hitX >= 0.65 && hitZ >= 0.65 && te.hasQuern) {
      te.shouldRotate = true;
    }

    return true;
  }