I mostly did this for my own game, but there has been demand from the community for this simple mod so I am making it for sale. It is a thin plastic sheet that fits under the coffin insert on Metallica Pro. It is cut close enough in size that it stays in place without any adhesive and is thus easily removable. It is easy to install: 1) lift the play field 2) loosen or remove the 3 skull lights. 3)Put the plastic in place. 4) Replace the lights. I initially I sold it very inexpensively under a pinside classified ad, but the current rules require this be sold as a "shop item" which increases the overhead of items in this price range, thus the price through pinside now has to have separate shipping and is now higher than it once was.