XRAY - Model racing cars

Hi, i am running my t4 on a very tight technical track using prima gt carpet medium grip and sorex 28jb,
the problem i have is although the kit setup is very easy to drive,
i find it to docile and it does not rotate enough and its also very pushy on power,

i ran kit setup and i have tried 2000 rear diff 2.5 rear springs 2.7 rear springs,
i have tried removing the inner bulkhead 2mm camberlink shims front and back,

things im thinking of trying,
2.5 springs in front,
middle length front camberlinks,
putting the rear diff in the up position to take grip away from the rear on power,

i need a very nimble car that turns on a six pence but does not push to much on power,

thanks in advance for any tips.

either or both of..

reduce the front axle width;use the the 1.15mm(gold) shims instead of the 1.5mm shims
reduce wheelbase by 1mm or 2

cheers I sorted problem, kit setup apart from 2000 diff oil, 2.5 springs all round and medium length links at the front car was awesome and had the fastest lap of the night.