Hi there,   I'm currently creating a block called a Mixer. Its task is to mix different ingredients. So far, I have created my own Recipe system and so on. Everything works, except the progression bar in the GUI. I have tried different methods, such as give GUI class access to my TileEntity to receive the values (mixTime & currentMixTime), however, it did not work. I have looked into the 'Furnace' and it seems to use an interface (IInterface) to send the different fields. Do I hav