Keep the mini-spool on the dirt track where it belongs. Yeah, it's cheap, but is it worth it? They can be destructive and dangerous. That is why they make differentials. A spool has no differential to it. Ask youself: Has the factory ever put a spool in a showroom new car? EVER??? No. There is a reason for that. Last mini-spool I bought had big letters on the packaging, "For dirt track use only!" I thought better and sold it to someone who really needed it. Too much liability.
