I'll give an endorsement for the idea of rotating the elbow to orient the gun vertically when shooting one handed. I shoot DA revolvers with .357 level loads on my range here on the farm. If there's any cant to the gun, it swings completely off the target when shooting one handed. Rotate the elbow to bring the gun vertical, and it tracks vertically and stays on target. Keeping in mind that a humanoid outline is a vertical target. It's a big difference for me with a .357 revolver, probably less so for you semi-auto shooters. But the idea definitely works.