So im excited about the XO1. Took it out with my GF and my friend that has his Nitro Rustler. Were running on the road, I cant do much at all because the road reflectors are an XO-1's nightmare (LOL). So I hit the throttle a little bit, and i wind up in the grass, put the car back on the road and an awful noise comes out of it. So i pull the lid off, thinking it was a rock somewhere, but it was coming from the rear diff. The axles were flopping around a good bit so i just quit. Brought it home, took it apart to find out the rear diff was missing one of the side bearings. Yes, MISSING! How strange is that? Anyways, im not here to bash traxxas, people make mistakes all the time. Im going to call them tomorrow about this issue. It ate a good chunk out of the diff housing and the ring gear has a couple of chips in it. Check for stuff like this when you get one! On the contrary, this thing is absolutely INSANE!