Taylorra
Sorry I wasn't more clear. What you are doing is what I was describing. This is close to the way I have mine setup for my transfer tables and turntables. The proficiency of toggling takes time and patience.
I am a bit surprised that the AVC works at the end of the daisy chain of 13 devices off of the Legacy/TMCC serial port. I have a few more devices and it required me to obtain the boosters to get the serial output to provide the proper power for the data/com feeds. I have found there is no set limit in number of devices, but the mix of them is what determines the need for a booster. If your setup is working that is great. Just be aware that if you add another TMCC controller, it might not get the correct data/comm feed.
regards
Ralph