Question. I have mine located where lowpro, but on the lower portion of the trim. The freakin thing keeps falling down. I'm trying to think of ways to reinforce the suction cup, but don't want to get that procup thing. I was wondering if anybody has used and taken off the little disc that comes with the units? I want to use it, but am afraid of the residue that the disc may leave when/if I take it off. Man, sometimes that glue stuff like changes the chemical composition of things and you can NEVER get off all the sticky.