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.