Looks like the 3 roller is geared. I'm unsure about the 2 roller version. If the 3 roller mill has 3 gears, I purchase today.
Apparently, the mills are so new the questions about the gearing and the shaft diameter are, when I looked, unanswered.
https://www.morebeer.com/search?search=mighty+mill
Apparently, the mills are so new the questions about the gearing and the shaft diameter are, when I looked, unanswered.
https://www.morebeer.com/search?search=mighty+mill