Trackdesigner. You need to ask Steve about the shell. He has all the details.
But like Patella said, enter into the 235mm class with it and hope the track is twisty and technical. The 200mm has the advantage in this layout over the 235mm. But they sure dont like a smaller 200mm car being able to hang with them. I know I wouldnt. Would make me question why I was spending $300+ on a modded .15 race engine for a .12 to out run it
The Serpent Team in the UK ran the 200mm with the 235mm last year and did very well against them constantly making the Main final and outpowering a lot if not all the 235mm cars during the finals.