Just so happens I am an engineer.
What it looks like to me is similar to how ski bindings only attached at one location. Somebody said it... So the board flexes evenly over the entire edge. Also, kind of similar is the clapper for ice skating. It leaves the blades on the ice for that short time that you're pushing with your toes. Remember the time decrease that gave the racers?
Yes, i'm a noob at the forums and I'm just going through past posts. Forgive me for reviving dead threads.