I have been building an engine terminal for my freelanced Colorado railroad in HOn3.
The roundhouse is based on the Como roundhouse model from Model masterpieces.
I have departed from the original as I skipped the boiler house and built full height doors as the roundhouse had as built (but was altered to lower doors later on).
I model the late 30's, so it is a bit modelers license involved....
The cast plaster walls were painted stone by stone (almost...):
The turntable is also a Model masterpieces kit with the pit and drive home made.
The 3D printed gearbox:
The base with turntable and rails to the roundhouse:
Getting it all assembled was a real chore.
Pre assembled the rafters which later will be glued to the removable roof:
Most of the ground cover in place.
Interior view with wooden floor on the left three stalls:
Stacks and roof beams in place:
Door construction:
I have mounted the hinges on half of the doors.
It's great fun to get them to work properly.
Here I've painted the doors on the roundhouse:
Something is hiding within:
Ahh, it's the old C19...
Black and white version: