

Can anyone tell me anything about this stringer? I tried to figure it out and snapped a string.
Tried to figure out how to use this thing with a friend who has a lot of experience on a similar gamma machine and we could not figure out how to use it. Cranking felt like too much pressure and winding the string around the crank (picture 2) would either pinch the string to the point of notching (which is what broke it) or just not pull. I was given this a few months ago by someone who swore it works. I have no way of contacting him or id ask directly.
Any info appreciated!