well i know about brushless. i run an lrp system in a TC. a mamba max 4600 in a DF-03, and a vxl system in a rustler. and for a while it was in a maxx. so if i go with the 7xl ill have decent speeds and enough torque to lift the tires off the ground on 3s. and once i can step up to 4s it will be insane? more in the 40-50 range than the 35-40 range?