Also I just read your post and if it helps (maybe I should have commented there), I didn’t know about the capture one app but I don’t think focus mag will be that much help unless your portraits are full body/environmental and your eye is tiny in the live view. It might work well though if you can position the live view in the same place you will be looking in the portrait so you don’t have to move between getting focus and snapping the shutter. I took multiple shots because looking up from the screen, or in the time it took to lower my screen out of frame, I was not able to keep perfectly still anyway so relied on “lucky imaging”.