Is it possible to use Coffee Mill for other grain?
That's a nice picture of a spinning blade type spice grinder you have there. The good ones will even do whole nutmegs. You can also use it to make limited quantities of powdered sugar, oat flour, wheat flour, buckwheat flour etc. About any non-oily seed may be turned into a powder with that grinder.
Trying to make peanut butter is a mistake. It goos up the blades something awful.