please try:

black springs all around. front 9.75, rear 11.00
front 500, rear 400, mugen shock oil
shocks outside arms, inside tower
diffs, 10 - 10 - 5
rest set-up: stock

car is unreal stable & supereasy to drive fast & hard. NO REAR is KICKED UP!
and for me it has still tons of steering, lap times are very good on a tight, technical track.