YES Don, that may indeed be its origin, but all the TMCC codes are built in. It was very nice of the guys who have been working on JMRI for years, to include Lionel TMCC as one of the many code sets. And it is for that reason I have chosen to use JMRI on my massive layout. I'm running 100% TMCC, as DCS codes are not published. If for some reason, I need to buy an MTH locomotive, I first convert it to TMCC. I do this because I eventually want to the computer to be able to run trains, stop, start and speed control.
I used all GarGraves flex track, and only use one outside rail for the ground on the mainline. The other outside rail is divided into segments. I had the advantage of having all the hardware I needed, and planned it this way since the beginning.
I'll admit that my way isn't for everyone, for a whole host of reasons. If your way works for you, that's all that really matters.
