Nice work Mike  .

The lock relay coil is fried in my Gulfstream , but for now I have just bypassed it by adjusting the relevent NO switches to closed , except for the hold switch which doesn't matter.
It just means that if you haven't finished a game when you turn it off, it will still be in the middle of that game when you turn it back on , plus a couple of other things, that don't matter , eg .. adding a credit via coin switch starts a game instead of adding a credit etc.