I’m with you here. Just replace every opto and be done with it. It’s literally around $25 in parts if you just replace the led and receiver. I just finished all of mine and so far, so good.

I just finished an extensive rebuild on mine, we shall see how well it holds up.

Undervalued game imho. But it’s a tinkers game. Probably not suited for the collector that can’t work on their own machines, and even at that, sttng requires ample prior experience - optos, connectors, board rebuilds, mechanical rebuilds, typically needs fully shopped, etc.

I bought my machine for $3,950 for mine and paid too much given the market and what it needed. I had to buy all new ramps, a new plastic set, new cannon covers and looms, full LEDs, tons of other mech rebuild parts, etc. I’ll never get my money back, but I may never sell mine either. It’s one bad ass game after being properly serviced.

I wish I had your luck. I replaced every single subway, VUK and cannon opto and still I'm getting an occasional random multiball, albeit less frequently. But it still happens once every few games. And I have new trough boards.

I need to do the borg ship and then I can say that all optos have been replaced. Which then leads me to suspect connectors and/or the 16 opto board. I can only hope that's it and not something silly like a marginal wire.....

So in my instance, part of bulletproofing the game is replacing every opto, most likely the headers and connectors on the 16 opto board, reflow solder on the 16 opto board, replace the connectors for the trough, and then be royally @#&@! off if it keeps happening. =)

Maybe I’m wrong, but I think some are intimidated by the technical complexity of sttng. I wonder what % of collectors have the ability to maintain such a beast. For me, it’s a labor of love. Others it could be a thorn in their side...