I was an arcade tech (on and off) specializing in pinball machines from 1990 until 2016, now repairing & restoring pins is just a hobby and my "happy place". I became a factory certified Williams pinball technician in 1991. I am really only into Williams System 11 machines and newer, but there are a few Bally, Sega & DE machines I dig... I've never really been a fan of Stern, altho I appreciate everything they do to keep pinball alive!