Hi Charlie! Cool topic!
I had a traditional Lionel postwar type layout with accessories that has since been sold, taken down and moved to a friends house back in 2005.
here are some photos of the four semi hollow doors with a plan from “Easy Lionel Layouts You Can Build” by Peter Riddle
While I made a friend very happy The layout was sorely missed so a couple of years ago I decided to rebuild it!
sorry the photos aren’t too sharp. These are the only historic photos I have.