It's a nice piece of machining, and an illustration of how much work it takes to machine something. Redesigning that mechanism to be in balance would be a nice improvement. Look at the vibration when it's cranked.
Here's the pro version of a yarn winder.[1] This approach has less vibration. It looks like doing this at high speed gets inertia working with you to make it easier. Textile machinery often relies on that. You can't push a rope, but you can throw one. That's how a jet loom works.
