Ray,
I'm working on a circuit modification based on John's information that will work for both conventional (American Models and SHS DC with 3 to 10 volts applied to the rails)and for Legacy (14 volts AC is 20 volts DC within the American Models passenger cars and cabooses after the AC has been rectified.) I had to dig around to find 5-volt LED strips instead of the typical 12-volt strips because the LEDs won't begin to illuminate in the typical strips until DC voltage reaches 7.5 volts. I did learn that the choke installed in series with power from one of the trucks is essential not only for DCS applications but also for Dallee Locomatic that SHS installed as an option in their F3 and F7 locomotives.
As an "investment" for any future DCS use and as a practical step for the four Locomatic engines I have, I think installing the choke is a wise move while modifying interior lighting.
