interesting, it really looks like it would swivel around and then the "sheeting angle" would dislodge it from the cleat part (thus dropping you and t-bagging you).
Now that i look closer there seems to be 2 separate trap wires? pulling from different angles (that could prevent it from twisting) how can that be possible?
You wouldn't hook into that loop shown in the line - the trap ring would be on the line that extends down below the drawing. The loop is what you pull to dislodge the jam cleat to change the height of the trap. With load, the line coming around and the angle of the little roller at the top pulls the line downward into the cleat.
