To avoid breakout I no longer route the headstock profile and use the method described by Brian here… I think I would try sanding/scraping the top face of the neck to remove the marks left by the collet. Just check…   Read more»

Hey Jonathan – That’s normal. We normally push it as far back as it will go (towards the body end). This way it cannot slide back any further so could only potentially move forwards but – it won’t move once…   Read more»