I recently disassembled my Playstation 2 Dual Shock controller to give it a cleaning, but a piece fell out and I can't figure out where it came from. The piece in question is grey plastic in the shape of a plus "+" measuring approximately 26mm across with small feet at the end of each prong. My first thought was that it fit beneath either the D-pad or buttons, but on attempting to reassemble the controller, there didn't seem to be room for it. I reassembled the controller without it, and it seems to work fine and the "feel" is the same. But does anyone know where it goes?