For a change I've bought a slices version of the Polygonum Cuspidatum for my Buhner Protocol and the powder I've managed to make out of it on my own smells and tastes miles fresher then the pre-powdered form the same seller (nuherbs organic from 1rst Chinese Herbs)
However while doing so I've manage to destroy 3 grinders already.
These roots are tough to chew...
What do you use to grind them and how fine do you go with it?