HI, Here's some photos of a car I just completed. Furniture was painted more or less the correct colors, and the added 'rug' is very very close to the original pattern. I constructed and added the deco-ish handrails at great pains to my glued-together fingers. They are pretty much spot on to the prototype, and I also added the illusion of a step down to the lounge area.
Of note is the painting on the wall of the lounge area. It is a miniaturized copy of the original that adorned the prototype. I added all the rear-end tackle to the coupler area. That was a nightmare because it need to be constructed. THe blue light in the drumhead was added, and is correct.
The GGD model had a a fairly good prototypical layout to the interior. One thing I did was remove the incorrect partitions where the stairs and handrails are and added the correct glass partitions.
Hope you like it.