Red Dog, didn't mean to ignore you, I hadn't checked this thread in a while is all. I got that seat at Target last year some time, I don't know if they still carry them. I call it the wide-a$$ seat and it is comfortable, but IMO it doesn't look "vintage" enough. It will be replaced this winter along with a few other modifications and corrections.
Speaking of which, I've decided that my engine has some serious crankshaft balance issues. The high RPM vibrations are INSANE. I didn't notice earlier because during break-in I was keeping it in low R's only. The easiest fix I can think of is to buy a whole new bottom end. Gasbike.net sells them for $50 with free shipping. But I think we all know how gasbike is. I might order a 66cc bottom end and receive a 1967 Buick Skylark instead.