There is a packer out here who offers a modified St Louis (not a St Louis at all) in which the flap and membrane are removed. They work great, but, cost a little more. One of my friends uses them for vending, no foiling.
I'm feeling bearish, and I'm packing a Wusthof Grand Brisket slicer from MABA
"I'm Armenian...perhaps...but then again...maybe not..."