Hario Mini Mill Slim Coffee Grinder Review . Feb 11, 2011 The Hario Manual Coffee Grinder, Mini Mill Slim is a great alternative Japan made, built to last. not flimsy at all! going to use it everyday, unless i''m clicks for Aeropress, perhaps the same for a pour over or go a little finer. a followup question. the brewing method i plan on using requires a larger grind.