Spare tire on the roof?

Moved mine from the bumper to the roof. Tire and rim, class C 16". Pretty solid fiberglass roof. Got a piece of 12" square stainless steel plate, about 1/4" thick. Enough ss screws around perimeter to hold down, silicone in screw holes first. Had tire mounting bracket welded to plate first. After every thing screwed in place, laid 2 layers of heavy fiberglass cloth over everything. Will NEVER leak or shift. People comment about how to get it down if I need it. Gravity is your friend here. Getting it up the first time was not much of a problem, just slid it up on an inclined extension ladder. Only hard part is checking air pressure. Tire has a heavy latch secured plastic and metal cover over spare to protect from weather exposure.