This is really interesting about the size of some of these track guys. Great thread.

What about the idea of using the same bike as a commuter and a track toy? I know from my experience in the motorcycle world it's a lot better to have (at least) one dedicated to each, but there are a lot more variables in the motorcycle world (crash damage, insurance, registration & licensing, passing tech, etc.). Still, commuting and track riding are such different activities that it seems like setting up a bike such that it's well-suited to one will make it ill-suited to the other.