Mechanical Heart (Modified Parts)

I donated this model to the local blood donor centre. I didn't want to use an electric motor, but I found the knob and gears were too low for elegant manual operation, so I changed the knob to a crank handle, and changed the gearing, to increase the beat rate for a manual crank These are parts I modified for Neybao's Mechanical Heart https://www.printables.com/model/296133-mechanical-heart Small gear Large gear Crank handle Crank mount The crank handle is a remix of JBV creatives Crane Crank handle