Let me say this that slow mo belay as you guys call it is far more impressive that one understands. I have set mine to where it almost can't be shock loaded. As in an overloaded situation results in a slip. I have set it to where it takes a manual action to set it hard. I have set it to where it grabs super hard Instantly. All these mentioned setting are just one hole away. It is so adjustable and replicable. Meaning if I know that Aztec works well on 2 2 and velocity on 3 2 I can switch between ropes seamlessly. If I am doing a bunch of spar work and I want it a little a loose cause all I am using it for is a repell device easy work just tick the a eccentric back a hole and off to the races. Again though it is easy to return to the previous setting.