I picked up a Rancho a few months ago. Only my second pin. I have been cleaning up the playfield for awhile. Almost done. There is this weird spot though where somebody glued a small piece of wood under one of the plastics. It looks like there would have been a bulb socket there, but on under the playfield there is no hole or evidence a component was removed. So I have no idea why this is here and if I would do more damage than good trying to remove it. Thoughts?