Al Henderson one of the greatest archery coaches suggests shooting an open ring with no pin in it. They human eye will automaticaly center an object in a perfect circle. You can try this by taking a wedding band and holding it out and looking at an object. Your eye will center the object everytime. I took a Check-it ring sight pin and cut the pin out to overcome target panic. Not only did it work but I am still shooting it in all my target shooting. That was 10 or 12 years ago when I went to it.