Punch, the real question is in your release grip, you say it's a modified pinch, and you show a picture where it seems the fellow is using pinch combined with the index and middle finger pulling on the string, is this an accurate description? If so then your release will still move the string to the left, thus you will need the arrow on the left side of the bow. Whichever way the string leaves your hand, be it to the right off your thumb or to the left off your fingers, that's the side you want to place your arrows.