I bought a savox to replace the steering one and put the original steering servo on throttle and brake duty. But my throttle servo died at a race so I replaced that with a new savox. At some point I will be getting a duel servo steering kit as our astro tracks are hard on steering servos.
Yes the red rear springs do make a lot of differance but good luck trying to find some instock. If you want some stiffer springs these will be your best option at the moment http://www.freeprawn...ions-sp43x.html