hello. i just got a jammin x2 and i am looking for a good race set up .. track is a little clay sand mix. long back stretch. and whoop sections bank corners and some other stuff nothing big... but i got the mamba 2200kv with team orion carbon 6900 30c 4s lipo.. we run about 15 min races witch i can make not a problem with this lipos .. but i am looking for gearing.shock and diff help .. thanks for your time!