attaching rack equip to my roof

flip, if you buy the Yakima tracks, they should come with stainless steel screws for mounting. (just make sure they're not too long )As far as I know,there is a thin sheet of plywood or fiberboard under your aluminum skin which you should be able to mount to but I would get that confirmed by Lance before you start drilling. Use stainless screws and Dicor "self leveling" sealant to seat and seal the tracks. The basket is strong but I think you will still need a forward tie-down/mounting point to attach to. I mounted a stainless tie-down on the roof as far forward as I could. This is where your strength will come from. Even with the basket, I don't think you'll get the boats above the AC though. You might have to load one on each side of the AC unless your kayaks are stackable. Good luck, Brad