This model was originally built by my father around 2005 / 2006 for an old 9v-style MOC steam engine we built together based off set 7722. It was three tracks long and one track wide at first, but I reworked it to be five tracks long and two tracks wide in late 2015. Both of these earlier models were almost totally black with a little splash of red. Fast forward to 2023: I have remodeled the MOC almost entirely. I've changed most of the black to tan, blocking up the lowest row of windows, and changing the red doors to light gray. The roof remains untouched except for twelve parts above the doors / back wall.
The building is a little under 5 tracks long, or about 75 studs in length. The maximum side clearance is good enough for a 10 stud wide model (no overhang at that width) while the trains can be no more than 11 bricks tall.
Here we see the rear of the MOC.
The roof comes off and the inside has a new raised platform to allow for maintenance to the engines. (before it was just totally empty) This model can hold most of my steam engine designs (not all at once of course!), although it is probably too short in length for some of my diesel units.
The dismantled 2015 version is in the spoiler tag.
EDIT 10/4/23: Real pictures added, entire post restructured.
Thoughts?