This sounds like it's getting not only troublesome, but expensive if you end up killing your PUGS. If you're using the clips that came with the PUGS, which are the only weak spot we found with the product, either a trip to Lowe's/HD or Harbor Freight could help solve the problem. We got some stronger clips and never had a problem with ours sliding. Also, a 4' step ladder was standard equipment. You might even give some thought to hand-sewing some brass/SS/whatever 1" rings at the very top edge of the trim that runs the length and then some type of clip to go through them to make darned sure they don't slide. Your original idea sounded good, but the further this goes, it seems like it could be not so effective. Suggest taking another look at some really strong clips.