If you are using the stock engine then the Traxxas FOC will work just fine for about $11.00 and it's already mounted on the shaft. Any lhs that carries Traxxas will have one. It's a 20 minute job, removes a small bagful of parts and the best bang for the buck hop-up that you can do.
andrew! man you're dumb. you dont got both reverse and foward. its one or the other i though i told you this last night! oh man you're an animal i dont no what to tell you anymore...:thumbdown