@bmoran4 Above you mention -
"the lead next to the one @gunrunnerjohn identified does not need to be connected to the FasTrack section to get power from the track. You can take that wire from the controller and instead connect it to an auxiliary power bus at an appropriate AC voltage (presuming in phase common ground wiring)."
does that mean I connect the "power" wire from the operating track to my AC transformer that is powering my accessories at 10V and leave the track on the wall DC power for now until I can get the whole loop converted? Can you / how do you Phase the AC transformer with the DC power brick?