Out of the box, the car is good. But, I am using different front and side springs. I've gone back and forth between the stock ball diff and the Fenix gear diff, I'm still undecided on which I like better right now.

I feel there is no need to parts swap on this car, other than springs. There's quite a few guys that had to change things out of necessity because of parts availability, but that is no longer an issue according to Giorgio.