By the way, this is one of the easiest things to check. I know some don't like paper-tuning but it works and works great for nock locator.
Clip a sheet of paper, say 24"x24" over a frame (open-ended box, picture frame, etc.). Put the frame at shoulder level about 2arrow lengths from your backstop (so the arrow passes clear through before it hits the paper. Then step back 6-9' and shoot a couple arrows trying to execute your best form. A level hole rather than a high or low tear is what you're after for nock locator. This is the first thing I do once I've put an arrow together for a specific bow.