raced with the semi dead 6s pack...that is now a 4s...
worked great!!
did all 3 heats on it and did the main on the 5s

when comming down the straight....the moment the front tyres left the ground i got off the throttle and hada perfect speed for the first turn
i might try the center diff again with some less balooning tyres.
iwas using zombi maxes yesterday casue it's a grass track...but next meet were back on clay so i bought some MTR crime fighters.
give the center diff another bash