Awesome stuff there man, 91 MPH est. is quite wicked indeed!!! I can see that you def dont have a stock engine in there, but the heatsink looks very HPI, is that what it is? I just have a newbie Tamiya TG10 and that thing runs about 40ish KMH (although i did blow one engine unit running it super lean and it did about 65 on that setting, sounded like an F1 car i swear).
Great job on the paintwork and the cuts, i am muchos impressed!! Only question i have is, how the hell do you control a car that goes so rapidly???!! Its madness! No wonder you ate up a tyre set so quick LOL. Awesome stuff man.