Here's an idea that I have had for a while

Sounds like a very good idea. If I may, though, perhaps two spares? We're dealing with A-bods: big and small bolt pattern cars and this way everyone who wants to has a chance to participate.

It's a good idea and worth exploring. And as a pastor of mine used to say "Nice idea when you are going to implement it?" I don't mean that in a bad way. It's your baby: time to drum up support, and once you get the support, time to run with it. I'm all ears. And willing to help.