OK so there are several schematics that I reviewed from DZ and others, but each one did NOT completely extinguish the opposing LEDs. Even using the DZ-2502 does not completely turn off the opposing LED; so if the switch is set to Green you can see some leakage in the RED led.
I want none because I will be wiring LEDs directly to a control panel and one one LED may be lit for each machine at a time.
So what I required was a sort of break-out circuit board for at least 25 switch machines that would wire to 25 DZ-2500s on the layout and from that circuit board to the panel where I needed to wire one momentary switch and two LEDS (one green and one red) for each of the 25 switches.
DZ had a circuit diagram and ROYZ at ROYZTrains had a circuit board;each one does not completely shut down the opposing LED. Meaning if the switch machine is set to one position and say the Green LED is lit then for these circuits the Red LED is not bright but still lit. This would be very confusing on a control panel for 25 switches with 50 LEDs some which are partially lit.
So during this Turkey period my son, a part-time electrical engineer and his good friend a full time electrical engineer, created a circuit i can use to create a breakout board for at least 25 DZ-2500 switch machines that will replace the DZ-2502 controllers.
I have a working (animated) schematic that in the next month or some will become a circuit board that some Chinese firm will build for me. I will likely make a few of these break-out boards since I have several control panels of different parts of my layout that I laser cut.