I was inspired by this post, so I decided to go ahead and install much of the fascia for the layout. It may be premature in some areas (no doubt I'll complain to myself at some point about lack of access to something), but is very necessary in other parts to start working on some basic scenery landforms.
The contours in the photo are obviously very rough; once the scenery profile is more determined I'll cut it to a nicer shape.