@Landsteiner posted:"a Legacy base can still address TMCC locomotives without the BASE-1 (I was presuming yes, but wanted to be sure)."
All TMCC equipped locos will respond to the Legacy Base, the 1-L Base or the Base 1.
Okay, cool and thanks. I guess I dodged a bullet in fixing my remote and getting one to fully work, but I suppose if it fails again, it'll be CAB-1L/BASE-1L time in the future.
Another question - do any of the BASE-1L's have a DB9 conncetor, if I were to hook up my laptop? Apparently, there is a program out there to allow me to control trains using a Windows app, connected to DB9 (I have plenty of USB to serial Keyspan adapters for my retro computer hobby, so that part is easy).