i also drive the 8racing +8mm chassis for 2months now on my rm3 car, and it makes the car definitely better, but the quality of the carbon is ... 
mine is broken on 2 places, 1 place after a run from 5min 
__________________
cars: 2xdurango dex210/dex410r, 3x cougar sv, losi 22, tardis, cr2 Atomic Carbon, xxx-cr, custom xxx-jv, asso b4, cat sx1/3, losi 8ight-e, hobao hyper 8.5, traxxas e-maxx, traxxas mini-erevo, serpent s400, mini-z's, lrp shark, ..
wanted: pred x10/11 and AC s2
|