Tighten and torque all 28(!) bolts to spec, then go find something heavy to tow. Or, find a washer. Whatever you do, do not drop a lock washer down between the tank and skidplate. The likelihood of that happening is directly proportional to how full the tank is. Yep, ours was full so it took a while before it was feasible to drop the skidplate and retrieve the washer.