I prefer to have the string nock under the arrow. I get my strings from Chad and he ensures that the 5/16 original Mercury nocks have just that amount of friction versus slippage then they stay in place on the string without sliding up the string. I still have some arrows with Marco nocks they work with skinnier serving areas, but because the throat of the nock has that wider hole, I need to use two nocking points for them. I have a number of arrows with the Bohnings, i have spread the teeth on most of them, they also tend to be a little bit bigger at the bottom of the throat, they are kind of a spring tension fit. I handle the arrows by the nock and I find the the index gives adds to leverage of handling an arrow. I know that John Schulz would file that index off, but I never cut my cheeks with them, so I leave them on.