I picked up my XB2 to use occasionally when I run indoors. The problem is that I only run stock. Are there plans to produce a smaller spur? Just for the hell of it I stuffed a 30 pinion on so that I could try it. and the car was way too slow. With the 81 that the car came with I'm not even sure that I could get away with running a 13.5. What is everybody else doing? If I can't get it to work I guess I'll sell it. Its too bad because it feels great.