heh....i have a d series and i wax b16 all day long, havent raced a b18. to you who think d series have no potential: your right, as compared to a b16 or b18. however, if someone wants to build a d series, let em do it without all the bitching. i mean all you see is b series this and b series that. if you want to go there, k series has more potential than b series. there is something always out there that is bigger and better and has more potential. so there is no sense in arguing about it