Hand crank machines are fun. I have several. Some with original hand cranks which are expensive when you can find
an original crank. If you are not a collector and don't need an original the Chinese clones will work just fine and are
much cheaper. Usually can find them on Ebay. There was even a man making hand cranks for a 221 Featherweight.
I have one. It allows you to use your 221 where you don't have power like in a cabin or camper.