I am using an MTH Z-1000, at present for my setup testing, and simple running.
You make a good point about removing the DCS receiver box from the system.
Even though I am using a DPDT switch to switch between conventional power and DCS power, that little box does get energized from the track, and lights up even when switched to conventional power.
I will have more time this evening to mess with it, and to see if I can make this all work.
I really do appreciate all of the information that you have shared.