I have often wanted to take this out and put a bigger one in the same size as the neck to keep the case centered
You can chuck it up in a drill press or electric drill with that pin. And it can be removed in case you want to machine up a pilot to fit your cases.
If you go this route, count me in for a set!Thanks everyone for your input, you would think that at least one manufacturer would have mentioned the purpose of this pin on their packaging! I also had the idea of making bushings to assist with aligning the case evenly to all sides of the cutting edges.