Hi Dale
The AVC looks EXACTLY like the TPC 300, it is black and the same footprint and wiring posts. I have sent a picture.
There is the BPC, ARC, OTC, AMC, ASC as separate devices. The ASC and BPC come in the IC version along with the TPC.
Lionel added TMCC control to a couple of accessories, like the Crane. I think a Coaling Station is another, and there are more.
hope this helps your endeavor.
Ralph