There seems to be a large demand for a gas tank other than stock, yet nobody seems to make one! I would love to make one, but I am only really good at small resin casting. I could never do something like a tank. Though I am working on a really neat PipBoy 3000 replica (for fans of Fallout) Well I am going to try and make a mold. Maybe I can carve a tank out of wood or foam or something, make a rubber mold, and then instead of resin, fiberglass the tank. I will have to think about it.