Ok , MX3 should do the job. Carefully read the directions for the end points on steering. You want to set full left and right one at a time ( be sure the servo is centered 1st ) I go full each way and back off the end point of the servo just a hair. You are just limiting the servo travel so that it isn't fighting the stops. Hard to explain, but look at the steering and you should get the idea. let us know how it goes