Nicely done Mike.  You might want to explore peppermills that have internal mechanisms.  I like the Crush Grind mechanism that is contained entirely within the peppermill body.  The grind coarseness adjustment is located on the base of the peppermill.  Here's a PDF of the instructions for making a peppermill using the Crush Grind mechanism available from Penn State Industries   (pennstateind.com   item PKGRINDTL).  I have also included an image of one of my peppermills made with this mechanism.  Enjoy exploring peppermills on the lathe. 
P.S.  I added the twist to the peppermill body.  Round peppermills also look great.