I got a hold of Richard, but he wasn't offering engine mod information. He also didn't comment on plastics or muffler. Oh well, I'll figure out as I go.
If all else fails I'll get a hold of Del and have him 3-D print me some plastics and then I'll find somebody to build me a muffler kit.
If all else fails I'll get a hold of Del and have him 3-D print me some plastics and then I'll find somebody to build me a muffler kit.