I find these very interesting and your friend really has a nice setup! I cannot tell you how many hours upon hours I spent mesmerized by these little toys, although, I hesitate to call them toys.
Everything in these is a piece of history and so real looking! I have learned so much when researching them to help put them together!
My dad was a Model Train aficionado and so we spent a good part of our childhood watching, helping and being fascinated by this hobby. I actually still find most parts of it totally intriguing, where the solder starts and designing and putting together the structures, to laying track.
Thank you for giving such a detailed history of his! I do love his setup!! I can see why you are thinking about your own!
Tip!