The XXXS dosen't use a CF chassis for a couple reasons. One was already mentioned, totally enclosed drive train. You loose that when you go to a plate chassis. Also, the G+ chassis is next to impossible to tweek. Plate chassis cars have to constantly be checked to make sure they're tweeked porperly. And a good hit on the boards and all of a sudden you're tweeked again. A lot of "hop-up" parts are just for show and will actually slow you down. If that's what you're looking for you can get all the red aluminum you want from Trinity/Matt Francis or Dynamite. If you're looking for things to actually improve your car, all you need is the black belt kit, and all the tuning option parts such as different castor blocks, rear hubs, springs, etc... Maybe some ceramic bearings. Look at most of the factory guys, thye're not running any of that bling stuff on thier cars.