Lashing up Legacy powered A, dummy B, Powered B, and Dummy A

I had that same set for a while and is very impressive especially with all smoke units operating.  The horn is pretty sweet also.

I assigned each locomotive an ID (e.g., 18, 19, 20 & 21).  Then built Train 18 with all of them included and proper orientation.  Running as an ABBA the front coupler, rear coupler, front headlight and rear headlight work as expected.  The powered B is the only other unit with a rear facing electro-coupler.  Both B units have backup lights. 

So, if you want to run any version shorter than the ABBA you will sacrifice rear uncouplers and backup lights unless you program the "shorter" combination as Trains also. 

I'm new to this... but, I think the short answer is Yes.   I run the Lionel Sharknose ABBA with each unit ID'd.  Today I was just running the AA units so I simply deleted the B's from the Train Configuration (Build) and hit 'Set'.  When I want to run a different configuration I add or delete the units and hit 'Set' for that run.  I have run the Dummy A leading the consist with the Powered B in an AB config.  I have also run the Pwr'd A and Pwr'd B uncoupled and six inches apart... pretty funny.

Thanks for your help guys! Steims, I kinda thought the points you made would be the consequences. Thanks so much for confirming! I agree the set is “eye candy”!

Dennis your method is something for me to keep in mind. It doesn’t take much effort to add and delete.

Thanks again…Rich