Thanks Guys for the comments.
JohnB - Firstly, just a point of clarification though regarding assigning ID numbers with the newer CAB-1L and BASE-1L models , you can now use any number from 1 through 98.
Secondly, to both John and GRJ regarding your comments about operating and non-operating couplers. I own the recently released Legacy equipped Canadian Pacific FA-2 AA set (1933510) and the matching unpowered FB-2 Superbass unit (1933519) and page 38 of the Owner's Manual is quite interesting as it relates to Operating in Command Control mode using Same-Engine-ID Addressing. Briefly, it states in part - when operating this way...
- "Turn the COUPLER switch OFF on your middle engine. This way the Front and Rear buttons on your remote will operate only the couplers on leading and trailing engines."
- "Set CREW switch(es) OFF so that speech comes from your head-end locomotive (only)."
Consequently Lionel has added more switches (under the roof hatch) on each of these engines which you can set to your liking. Interesting.