Jim, I did look at it, but not sure I could find equivalent parts that would work. But in this case, I did get White and Green LEDs installed. So I will have selectable classification lights via DCS. Off, WHT, GRN. We did modify the non lighted number board and make them lighted.
I also finished up the boiler to chassis to tether harness. And have the steam chest steam piping. Also made the tender tether.
I am using a straight 10 pin harness, this allows the 6 PS-3 wires plus 2 spares to bring over Tender outputs for the boiler (extra class light).
You say 6 plus 2 equals 8 not 10, well the AC and Motor leads on MTH tethers are 22ga, and all the others are 24. So I doubled up 2 of the 24 gauge for the other 2 signals. AC Power Red Black, PV Yel, PCB Grd Wht, 5V Gray/Org, Data, Green/Blue. That leaves me pin 1 and 2 as spares.
I do have flickering LEDs for ashpan lights and a plan to install them, but want to do some more testing, so have not installed yet.