But some ops did resort to magnets. And players had their tricks, strong magnet dragged across the glass, drilling into the side of the cabinet. And ops had other tricks too. etc. etc.
Ops and players were trying to get ahead of each other for years.
Gottlieb at the height of their EM days, employed eight people whose job it was to try and cheat pinball machines all day long. And they thought they were three months behind the kids on the street. And those weren't gambling pins.
The good old days.
LTG : )