Over the past couple of days I tore up my fingertips some more carefully putting down more faux ballast in a way that supports the track on a completely flat (tiled) surface while providing studded texture all around. It also helps keep everything from sliding around much whilst still allowing a bit of flexibility to account for table edges being bumped & such.

Then I added this diesel shed/motive power depot/maintenance shop/whatever it's called in your local region or on the specific train-related sites you frequent :)  I realized while filming this that I had wanted this specific type of model building since I was quite young and first learned about HO scale trains.  Life goal achieved!

Video: Custom LEGO train engine shed / shop / depot in the city!