Joe,
I didn't have any intention of moving it, so I didn't build with that in mind.
Floor to ceiling scenery and tight basement stairs and doorways just don't do well together.
Thanks to OGR magazine articles and Rich Melvin's OGR layout video, it lives on in a way.
I may still have a few building flats and other odds and ends in the attic, but it's tough getting up there now.
Jim