I just finished assembling, aligning, and setting the gap on the MM3 that I ordered last week. It has a 1/2" drive shaft; therefore, I will not be hand cranking this mill.
I have word of advice for anyone who is contemplating purchasing a Monster Mill hopper. Follow the directions, so that you can avoid having to assemble the hopper twice. Resist the urge to attach the hopper side plates to the hopper end plates before attaching mounting brackets to the the side plates.