I believe these should be unbanned. Idk if they are banned but ik I can't make them. I tried awhile ago, couldn't make them. Ah, so my reasoning behind the unbanning you ask? Because when you put lava in a combustion engine, which is connected to a HV engine generator, it ends up giving you the same amount of EU. So, I really don't see why they were banned in the first place. If there was a reason, please explain.