I have an RUCC kit and as far as I know, Roger didn't have an MSO for it.
Not sure about Tennessee but all I needed in Oklahoma to get mine registered were the receipts for frame, body, engine and tranny. I also had to sign an affidavit stating that it was a home built car.
Feel free to join the RU Car Crafters Forum on this site, we have 15 other RUCC owners there.
How do you like the kit? For me, assembly was a little challenging due to the lack of a decent build manual. However, now that it's finished it was worth it. Mine handles fantastic, the chassis he built is high quality. He made a very good body too, I like the way all the edges are rolled under and the thickness of it. I've noticed that on some kits, when you close the door it sounds "flimsy". When you close the door on an RUCC kit, it sounds solid as it should.
Post some pictures, we like pictures!