13.5/ 6 cell wouldn't be to bad(we drove stock/ 6 cell at nats in 04).. I mean Taz can drive one, then anyone can lol. For the more experienced guys I have a feeling that 10.5/ 6 cell might be the favorite.. I love the racing in TC 10.5, its good close racing but it doesn't really require a lot of throttle control.. Thats what I miss about pro 10 (mod). This weekend we have a 235 pro 10 race, but its with 4 cells and that makes baby jesus cry..