C903,

I find ease of changing the position of a tie-on nocking point, one of it' s greatest advantages. You want to tie it tightly, but still be able to " thread it" up or down the string. With the proper tention on the knots, it will not move while shooting with a string loop, yet will still twist around the string with enough force from your grip. One of the keys is to alway have an arrow nocked when drawing. I always put a dab of white-out just above my nocking point so I can tell if it' s moved. If the string has crept, it' s only a couple seconds to twist the nocking point up or down the string. I can' t imagine using a brass nocking point, because of the ease of changing a tie-on one.