hows it going. if you want to tune the diffs, you should use something like diff clay, or silly puddy is what i use. Also some must have upgrades for this car are the ball bearing kit, the aluminum shaft, and the aluminum motor mount.
I just got one also, this is my fifth or sixth tt01, but first e. I'm doing mine as a rally car build and one thing i can say is that bushings are crap. i melted at least two (i'm still pulling the car apart) an probably more. So ball bearings is a must have!
any ways this is an awesome car and i'm sure youll love it. enjoy.