That's an early run original playfield. The lock insert is green! I have a TZ "in a tote" that is waiting for a restoration with a Mirco 3rd magnet version. If only I can find the time.

If your solution doesn't work out then I have a pass-through board that supports the use of a standard opto pair. The board provides the transmitter drive and switch matrix interface. I believe the hardware can be acquired from various merchants. I also have the 8 high power driver board but I am sure you have the experience to be able to install the TIP36C and heat sink on that board.

If you want to add support for the prototype/sample flasher board in the door panel I have the boards that support that. You will need to add the wiring to the harness.

I am still unavailable to fulfill any order for another three weeks or so. I have travel (long haul - ~13 + ~2 hour flights) ahead of me and given the current circumstances of flights and cancellations I am hopeful that the backlog will have eased by the time it is my turn to travel. I don't want to get stuck with a canceled flight at the layover airport after getting off a long haul flight.

I am also sure that either you or dmacy will reach out if I forget. I have the boards in stock and they are both very small so they won't take much time to build (slipped in between build phases of the big boards). In the meantime feel free to post or PM if you have questions about wiring and such while planning the installation.