Any arcade type button would make it necessary to drill a hole into the sides of the machine with the bottom button contacts visible under the glass right above the apron.
This design is perfect for thick wood control panels for arcade machines, but for this particular application they would be too bulky. The typical American arcade style buttons are typically fairly deep, further enlarged by an obtrusive microswitch. So looking around the internet for a source for decent arcade-style buttons, I quickly realized I had to choose a more specialized design. While I know full well how unreliable the original stock flipper buttons were, I had no idea just how much of a dramatic improvement adding new buttons would be.
