Rich - I've been using the same holster/ammo pouch for my H&K that I used for my SIG P320 - not supposed to work, but it does. It's not a perfect fit, but I believe I'm a tinkerer, like you and I'd been seeking a way to even out the pressure of my rig in that very area. I'd been looking at buying some closed cell foam, but I like your suggestion waaay better for all the right reasons. Not only are they much cheaper, but I believe the Scholls inserts will hold up better as well. Thanks so much for the tip!