Sigh, Please read these, He copied the thread title I said he should use as a example, It could also be inverse and be XFG XRG on blackwood/rallycross - It could be anything.
Anyway, Which car would you like help with first? Say, If you wanted FBM, Go drive a few laps and post a replay up here for us to look at, And we'll tell you where you need to improve.