PEEP TWIST! A well built string, stretched correctly and served in the right direction will not rotate. So adding a peep or anything else will not effect it. Once you have 20 shots you add the peep shoot a few shots and twist the string to put the peep in the proper place. Shoot a few more shots after the peep is tied in and you should be good to go. No need for peeps with tubes that just indicates the string was not well made if it rotates. No need for unequal strands on each side of the peep that too means poorly built string. Hutch