THe switchback is probably one of the best sleds ive ridden on the trail the 136 seems to soak up the bumps good and didnt notice any handling difference in corners than a 121 mine had an 1.25 lug ripsaw and i ran 6" carbides as well
A switchback is a trail sled. It's already set up that way. The only changes you'd make, would be for personal preferences. Ski pressure, shock settings, etc.