I use a Fletcher peep and keeping thepeep aligned is not an issue if you have a quality string. That is the starting point. After shooting in the string,( I use strings by Gibblet aka Bucknasty), install the peep and you shouldn't have any more rotation problems. If you have a lower quality string you will continue to have peep problems. The more the string creeps the more your peep will get twisted, and the more you will have to adjust.