The photo is just an illustration. My ramps are long enough to get the quad in the back just fine with no high centering issue at all. I've loaded the quad many times prior. I've also had the quad in the back and on the ramps and there will be plenty of room. The plywood will not shoot out the way I am designing it. My only concern right now is the weight on the bumper WHILE i load it.
Payload wise the truck can handle 1550 lbs in the back of the truck. I'm not planning on towing so I'll be completely fine. Even if I did eventually tow my travel trailer I'd still be within limits, its small and I've already done the calculations.
Again my only concern is that 500 lb max tongue rating on the bumper and if it would hold the quad while I load it. I have always loaded with the ramps on the back of the box or on the tailgate, not on the bumper itself.