bashing or racing, forget the roto start. Get a starter box. Mine had a roto start when I bought it. TROUBLE. The roto start itself works fine, but the one-way bearing on the back plate kept going out. Also, seemed to be not enough spin for the motors to get a good start.

But, with that being said, if you still want a roto start, I have a losi roto start wand that I will sell you cheap. Just pay shipping and some extra bucks and its yours. Not sure what all it will work with, I would assume all .21 motors tho. Let me know, I have PayPal, I can get that shipped right out.