works pretty fine.
last weekend i won my local TCS against all M-05s fastest lap was nearly 1 second faster then the second.

my setup for aspahlt tracks (posted earlier in this thread)
2 degree rear
600 tamiya damper oil front
500 rear
red spring front & rear
tamiya red m-06r dampers
carbon damper stay rear
hard stabilizer in the front (none in the rear)
tamiya type a tires all around.
SWB and Silvia S15 body
M-05 ball diff or gear diff (depends on the grip of the track)