These bolt straight up to the rear of my pajero with ease. I don't own shelf queens so I've been running this with a brushless system and I've not ran into any problems at all. Again it added more weight so my center of gravity has lowered so I don't roll as much. Smooth, smooth, smooth are the only words I can use to describe how it rolls. If you own an XC/CC01 then you should buy one...no you must buy one!!