need help decing if to go with 850 xp or should i just build the quad polaris ahould make? sportsman 500 with fst 600 kit making 70hp at crank? same as xp but old 2006 chasis weighs less just to play with and trail ride. have 400 scrambler and 440 pro x motor in second scrambler just want independent for more mud and when take kid along any help would be great thanks