Hi, I would like to introduce myself. My name is Gary & have been playing pinball since 1972. I have been collecting EM Gottlieb pins for about 13 years. Between my 3 brothers & I, we own over 35 machines. I would enjoy helping anyone with techincal/troubleshooting issues on any EM Gottlieb machine & maybe system 1 through system 80A. I was an electronic technician in US Navy for 6 years followed by a bachelors (4 year) degree in electrical engineering. I have recently written 40+ page documents on the theory of operation for specific machines such as Target Pool, Egg Head, Spirit of 76, Top Card, Golden Arrow, Sure Shot, Mayfair, Spin-A-Card, & Hi Dolly. Please feel free to contact me here in the states.