I will have to check out remora. I've got a desantis nemisis that I use for a g26, it's easily my favorite holster. It is the same idea as the remora. I carry at 4 and in the front with it, its never been a problem. I need a new holster for my g19, I am going to try out a remora for it.
Quick question on how "secure" these holsters are: Would they stay put (holster and gun) if I tear off across the yard at a full sprint to intercept a 2 year old wandering toward the road?
Yes.
Mine does shift in my looser jeans when I bend a lot (cleaning up after 2 year old) or when I do a lot of over my head reaching (ie vacuuming spiderwebs). Tighter jeans seem to conceal better and hold in place better.