I feel kind of stupid posting this. I have been shooting 3-under since taking lessons with Rick Welch in 2006. My shooting had never been better. I had always heard that 3 under shooters need a higher nock point. Because of this..I have always shot a high nock point. Generally nearly 3/4" above square. Recently, just for grins, I decided to see how low I could put my nock point and still get good arrow flight. I was pretty astounded to find that my arrows are flying even better, when I lowered my nock point to 1/2" above square! I get better arrow flight, even when I have a form error. My arrows are flying like lazers. Although I was getting great arrow flight before, I have attributed some of my "flyers" to my skinny carbon shaft bouncing off of the shelf a little upon release. For the first few days..the lower nock point was causing me to shoot high...understandably. But now, my brain has adjusted, and I am really enjoying it! I'm sure most of you 3-under shooters have already figured this out. I guess I'm a slow learner!