Thank you for letting me know. The issue has been fixed on the turnable shoulder pylons by shortening the post. The recesses could not be created due to clearance issues. I will no longer be modifying or selling theses as the turnable ones have shown to be cheaper and better as of yet.
mctheo2000@carloj2011 Bigger size, working ball joint with correct connection size, and a 3-piece process: just break off the piece from the sprue, sand, and glue the head together with the ball joint inside