Salt and Pepper Mill Grinder

I was looking for a good pepper mill and ran across a couple designs that sparked the idea to make them a little more useful. These are used and tested to get to this version. Any suggestions are welcome and I left signatures of past versions that were done very well by past designers.

If the salt crystals or pepper corns are large, use a short back and forth rotation.
The tightening nut can be used upside down if needed and adjusted to determine size of granules to flavor your food an