I'm curious, has anyone attempted to make a fiberglass tank? I can't imagine it would be too hard, but the only caveat would be the necessity to use ethanol free gas. I've looked around in a couple places and keep seeing that it is possible, but the risk of break down once you start using gas with ethanol is too high. A huge plus is that anyone looking to make a custom gas tank now has almost endless possibilities for shaping a tank without having to weld/braze/hammer metal.