The idea of the over travel of the slide was to not allow flex to damage the servo when it was holding the carb at full throttle. (punched landing a jump would be a good example.) If this is a concern for you and your carb has no over travel you can also handle this with the linkage.
Put some fuel tubing between your servo horn and the throttle collet. The rod will have to be a litttle long but the fuel tubing will absorb the flex before the servo or carb gets damaged. You may also use a spring like the ones included for the brakes.
Hope this helps,
TEX
Had a great night of racing last night. This thing gets faster every race day.