I bust out a drill with a 7 mm nut setter.
Works like a charm. I give the trigger the lightest squeeze and I can grind my coffee in ½ the time with ⅒ the effort.
I have a special 12" wide cabinet/countertop next to the fridge, which my wife has designated as my coffee area. As long as I don't intrude on the rest of the kitchen with it, she's cool with it lol