@Greg Houser posted:
The ironic thing is that's what I had on my last layout (though it was only 2 loops and half the size) and I had no issues even with all the switches and accessories wired via an AIU. Obviously, that was just pure dumb luck.
The AIU control isn't the issue, it's the track signal that's the issue. The AIU is connected directly to the TIU and to the switches & accessories, no track signal issues there.
I have always been of the "common ground" school. Is this concept changing? I run Legacy only, with 180 watt power bricks and a ZW-L. I ran a common ground for the entire layout - all 5 tracks. Was this a mistake?
IMO, that is a mistake, but the proof will be in the running of any MTH DCS locomotives.