So make infinite lava at a massive energy loss? Yea, that's very op. Let's see, we'll go with the base electric engine, so 6eu/t for 2 mj/t, you need 20k mj per cobble to turn it into lava, and at a max of 20 mj/t for full speed, that means 10 engines burning 60 eu/t for 20 mj/t. The 20k MJ...