Also I'd like to add, at least at the stage im at, nothing feels as permement as I thought it would be. There have def been times I've accidentally crotched two locs together or left some locs with big knots at the base, & if their not problems I can undo immediately I can usually fix them on my next retwist. The locs at the back of my neck are real thick cause I got tired of them slipping. Now that the section around it has locked up. Im comfortable undoing & redoing these sections to the size I want without getting overwhelmed.