I recently aquired a 1967 Midway Flying Saucer shooter. It is about 95% complete. I can't seem to figure out one of the last issues with the machine.When I start a game, it doesn't end. It shows the 25 shot limit on the screen but it will not stop giving me more shots. I cleaned the contacts on the game stop relay. One question I had was what are vibration switches and how do they work? There are two of them and it says "operates game over relay. Maybe this is the answer to the game not ending.