Got this updated part a few weeks ago, and it's looking promising.
Shown here mounted on the pentagonal shaft head on a Porlex mini grinder. The shaft of the part fits in a standard hand drill/driver.
What I really want here is to put a little DC gearmotor on one of these hand grinders, and then link it up with my GCal so that it grinds coffee for me every morning when my alarm goes off. We'll get there.