Hi, wonderful mod. Rotate key seems not to rotate the fuel cell building after placing, pre-placement rotation is input left and up only.

Yeah, that's a difficult one. The fuel cell is like an engine. It's supposed to have an in and an out pipe on the opposite side, but those don't fit on the graphics I have and you end up with floating connector pieces. I'll try to add the missing pipes when I can find another graphic that fits.

Still working on the graphics. I'm trying to make something, but at this moment it still looks like junk :(

New graphic, so now it all fits and can be rotated