does anyone have a roof rack mounted on a fiberglass topper?? if so post up a pic. i want to do this but i am unsure how much weight the topper can take. also how did you mount it? i am thinking if i take a roof rack and weld a flat bar on each side it would be enough to distribute the weight across the whole side of the topper that it would hold. don't want to put alot on the rack but at least a farmers jack, spare tire, shovel, ax, and few lights and some gear. 200- 300lbs when all done. any thoughts?