So I've been thinking about experimenting with doing some plastic molding. I don't know if injection molding or vacuum molding would be more suitable. I'm thinking about trying to build a gas tank for my motorcycle. The current one is far too small and I can't find any aftermarket options (other than carrying auxiliary tanks, which isn't my first choice). So, does anyone here have any kind of experience with this? Would a Styrofoam mold work? I don't plan to reproduce these, this would be a one off thing. Tell me if I'm crazy