I've known who Bill("Billy") was for years. Watched him race dirt track at many many local events. Pretty damn good rider. His ol' man ran Faribault HD for 3 decades and was an accomplished racer himself. He helps design and sell these trick street-track-dirt-race-frames for Sporties, Buells, whatever. They are pretty damn cool. Not cheap - but, worth the price. He'll let you test one for yourself. Check 'em out at the site of grandnationalreplica.com . . .