gunrunnerjohn posted:PS/2 smoke units are the same as PS/3 smoke units, no modification necessary. Drop me a line to my profile email and I can fix you up with the stock regulator board that comes in many of the PS/1 steamers, I have a few of them left over from upgrades. The board takes track power and gives you 6VDC for lights. It also has a special output that's current limited for class lights/markers.
That's good to know about the smoke unit.
I've decided while I'm in the locomotive to upgrade the lighting to LEDs. I'll replace the grain of wheat bulbs with 3mm LEDs. Do you happen to know how I can wire the little green ceramic LEDs used for the marker lights to track power? I'm brain cramping on what diode/resistor combo to use for them (I've attached a picture of the LEDs).
If I run the LEDs off track power will I still need to use the inductor in the kit between the power wire for the LEDs and the center rail roller? Since they are not connected to a capacitor the inductor might be redundant. 
