Perhaps it's worth defining what the middle of the ski is. I think this image helps us understand that we are referring to the functional middle of the ski, as opposed to the geometrical middle. NE is correct that the binding and boot are behind the middle of the ski, but are they not in fact placed over the sweet spot, the place where you can engage the entire ski from a centered stance? That is the functional middle of the ski, the center of the radial cut in an asymmetrical design . Hope that's not too fuzzy.