Roof top satellite installation

I like the sat. on the roof, except in trees, of course. But it's great for the kids while driving and using the inverter to have tv. I used eternabond tape in small bits, and alternated with those plastic wire clamps that I screwed into the roof. But I used dicor lap sealant in the screw holes, then on top of the screw. The tape can eventually peel up, given a constant pull, so that's why I used the screw/clamps also, in case the wind were to pull constantly. Most commenters say that the tape can't be moved once it's in place, but I've been able to do just that on the roof, even after prepping with the unbelievably expensive eternabond cleaner. Silicone residue is something else it doesn't stick too well to, also. Since the roof is sort of glued down and stretched over the top, I wasn't too sure about bonding to something that is not structural, hence the screws also.