OK, I found one thread on door layouts.
https://ogrforum.com/...door-layout-jan-2016
Below is some pictures of my 027 layout. I wanted a retro layout to display and operate my vintage 027 equipment. If I had to do it over, I would make a few adjustments.
This is an overview of the layout, its 42 inches wide
This is a shot of the yard area. While it is powered to allow an engine to operate, I never do. It basically used to operate the accessories. The tunnel does not accommodate the GP9.
I have three 1122 remote switches, I never use them. They, along with the controllers are a bit temperamental.
I do love the low-profile look of 027 track. I bought a lot of used track and cleaned the up, the patina is amazing. I added extra ties and ballest.
These two operating track sections are next to each other, I am going to redo this to add a spacer track. They are two close to be able to operate cars next to each other.
I have an upper level. While larger engines like a GP9 can negotiate 027 curves, the curves are too close to the bridge on the upper level to provide proper clearance. The outer siding makes the layout wider, without it, the layout would be require only about 32 inches.
This is the yard, with several operating cars and accessories.
In another room, I have a shelf display, I pack a lot of accessories and operating cars on it. for some of the accessories, I use light switches to turn them on and off.
Hope this helps!