Our club is constructing a new layout that will have three separate track loops. We want to be able to run some of the loops in command mode (for Lionel Lionchief/Lionchief Plus 2 engines, and possibly Legacy engines), and run the other loops in conventional mode (for older Lionel or MTH engines). We intend to use a single ZW for power for all three loops (at least for now). Ideally, we'd rather not dedicate any loop to Command or Conventional, but simply put 18V to the loop if a Command engine is on it (and control via the Lionel app), or use the ZW variable handles when a Conventional engine is on the loop. Is that possible? If it is possible, can we use a common ground bus for the three loops? I had heard this was not possible with Lionel's Command engines because their control signal was carried on the ground rails (as you can probably tell, I don't know much about Lionel's Command systems - I'm an MTH DCS guy!)
Thanks in advance for the help.