Ok, i know I've brought this up before, but as far as the nose bridge goes on Pennys, whats beyond the rivets?? Anyone know whats inside the frame pieces that loosens up? There MUST be some type of rubber or plastic sleeve thats held tightly by the rivets. I ask this because eventually oakley will no longer service these, and i dont know about anyone else, but i plan on keeping mine LONG after oakley wont take care of them any longer. I want to learn to tune them up myself.