Yeah 2s is the way to go, but trust me it's definatly worth having a go on 3s..... Stupid fast can be fun

With the stock wheels there won't be to much load on the gearbox, I wouldent be to worried the traxxas gearbox is strong, and been a VXL the gearbox has all the upgrades.

If u stick with buggy wheels and not truggy or MT wheels u should be fine.