Snug-down clip for TonnoPro Tonneau Cover

I purchased a [TonnoPro Hard Fold Tonneau Cover](http://www.realtruck.com/tonnopro-hard-fold-tonneau-cover/) for my truck. The rear clamps did a great job keeping the rear corner gaskets tight against the top edge of the tailgate but, across the top center of the tailgate, the cover would bow up a little causing a gap between the top of the tailgate and the bottom of the cover's gasket.

Although probably not a big problem it did bother me. So I devised a way, using a bungee cord, to pull