I hadn't thought of hanging one upside down. That sure solves the problem of drawing it one-handed, as I want to be able to do with a neck knife. I really hate knives hanging from a belt. They take up too much room inside a bag, and I haven't got around to putting one on the outside of my bag. Basically I'm looking for utility rather than any concern about whether someone thinks I'm PC for their interests. If it's not a neck knife, it's going to be a folder in my pocket or maybe, just maybe on my bag.
Any fears of that blade piercing the leather if you fall on it or bang into something? I've recently tried lining sheaths- one with rawhide and the other with thin, carefully fitted slabs of oak. Not completely happy with the rawhide, and the wood works well. Liner #3 is going to be wood.