You seem to have a polished floor that offers better grip than I do . Even a straight line is a problem (and i've tried 3-4 set up).
This video has a bit more grip than the one we have and the track being much smaller they don't build up speed like we do (just to give an idea) . And these I believe are 4wd not 2wd .
http://www.youtube.com/watch?v=J2GOS...eature=related
On my RB5 the set ups I've used have a lot of rear grip but no matter what I did the front end had no grip what so ever . You turn the car goes straight on as in dead straight lol . If you touch the brake (not good) or let go the acceleration it would turn .... briefly ... until it span out on me ...
Good luck for your search.