I was too lazy to mess with the f8/revolver, but the rope wrench was too easy to say no. Did some tricky maple pruning today and loved it. Is there more to it than this? I am tweaking the tether length but other wise it is supple and easy to advance footlocking or tending slack, just like the man says. I was also tending slack by grabbing the wrench and pushing it up, and it pulls the hitch. Again, seemed so easy I thought it must be dangerous!