TMCC and Trackside Accessories

Sure enough, no headlight flickering with the plastic station in place. See video clip. So, it was the metal platform....or was it?  Continued next reply...........

Then I wondered, was it the metal or the fact that the platform was illuminated? My layout is powered by two ZW's, one for each upper and lower level. The transformers are phased.  Lower level accessories come off one transformer, upper level ones the other. the Legacy base and TMCC base come off the upper level, but TMCC works fine on the lower level, I guess because the transformers are phased. However, it also works even if there is no connection between transformers, as I found when taking the modules to Trackers shows.

I ran the train by with the metal station platform in place, but not connected. No flickering...see video clip.

I will leave it to those of you who are much more knowledgeable than I in the ways of electronics and TMCC to explain these observations. They do make me wonder: would it be better to power accessories from a separate transformer, not sharing a common ground with the track? Or, is it only an issue if they are trackside? Is there a potential for significant interference with multiple illuminated trackside accessories?

As always, thanks for any advice and comments.

And, of course, thanks to Boxcar Bill for another great upgrade!