I kinda figured that's how it works to a degree. But I didn't know if it was possible to be able to torque enough to make a good contact between the two clutch plates. I'm amazed it doesn't slip easier under such forces. I didn't know it was on little twisted roundstock type set up. I was thinking two bushings cut at a taper so when you try twisting one relative to another one has to slide axially, pushing the spool into the chain sprocket. What keeps them apart, spring loaded or they naturally separate as one would be spinning at all the time. (chain sprocket.) Also, in your pics you sent Avgv, its hard to see what is there for a chain tensioner. Their rare hear. In fact, I don't think I have ever saw one on the island here. I heard of one guy that had one I believe. So no way for me to look at one.
