A few side issues, so that in the future some poor soul does get confused.
- The Cab1 transmits to the Command Base, and there is no reverse communication. (The Command Base transmits to the track, and for at least TMCC, nothing replies).
- It is the red LED on the Command Base that blinks. The green is on when power is on. (Same for the next gen blue Base1L). I just tested both to make sure.