I have serviced hundreds of the Bally pins over the last 21 years. Some are operated, & most are in homes. I re use old varo bridge rectifiers on the 1978 - 1980 Bally ones where the board is still good. For operator or home hacked boards I replace with a new board. Some service techs in the past would solder the wires to the pins. I bring it back to factory or better, with original varo bridges if possible. Use trifurcon contacts for problem wires (G.I.) etc. & regular contacts for low voltage.

Also re use old bulbs to reduce costs on G.I. 47 bulbs for head, 44 under playfield, & pops. The operator I do work has bought leds, those flat top ones are crap! Other frosted ones can be poor also. I have a bucket of old 44 & 47, GE ones are the best ones for pops (bigger filament).

Always thought the hacks to test points was some non pinball tech's handy work. Saw a few EBD's done this way. One local bulk buyer would splice the wiring harness to fix bad contacts. Recycle old bulbs, every dollar saved goes to your bottom line. Back 10+ years boards were scarce or not available, so you spent many hours repairing them if you could. Now we just buy new, reliable replacements. I have many tray's of ic's pulled from the old mpu's. Same with displays, buy new set, & used old good ones in another game.

In Canada I get $2 million CDN liability insurance for $500 US. Need it for parts production for PPS & Gottlieb LLC, both require $1 million US.