If you're considering racing, definitely go with either the LRP Sphere Competition 2007 or the Novak system. The Mamba and others are not sensored so the throttle is very erratic. With the LRP system the throttle feel is very linear and similar to brushed. We spent a long time working on the throttle characteristics to mimic the feel of brushed
* For 2wd I would recommend a 7.5 LRP Vector X11 with the Sphere Comp 07' on settings 2/1/2/2. This should feel similar to a 13x2.
* For Truck I would recommend a 6.5 LRP Vector X11 with the Sphere Comp '07 on settings 2/1/2/2. This should feel similar to an 11x2.
* For 4wd I would recommend a 6.5 LRP Vector X11 with the Sphere Comp '07 on settings 2/3/2/2. This should feel similar to a 10x1.