Best wishes for this new year!
Has anyone built one of these kits? Stunning stuff, and not cheap. But it would certainly seem one gets "bang for the buck"!
Personally, I'm not in favor of detailing one can't see in operation. I have one insanely fine German style cargo "caboose" from Hubner, now available slightly simplified from Märklin. The Hubner wagon even has the train personell. Only thing I have considered, is adding paperwork in the office section, where the train Fuhrer is seated.
The train Fuhrer commanded the train, and calculated the number of braked wagons needed, as the composition of the train changed along it's route. They were part of all trains even some decades after WW2, since there were still wagons without airbrakes in use. They only had piping through the carriage.
Strangely in contradiction to my stated attitude against "invisible" detail, I also know, that if I could only keep one piece of my 1:32 train collection, it would be that wagon - not a locomotive. Even though, it is a pain to lift off the roof to enjoy the inside.
I have pondered some kind of display with an angled mirror, showing the inside. But the wagon would then have a strange look without it's roof.
Actually, I think a smoke generator for the coal fired heater stove chimney, would have made more sense than the inside detailing. Also, some cargo on the floor, viewable if one opens the side sliding doors, would have made more sense., than for example perfect underfloor brake detailing.
But in that rivet spirit, that obviously can be quite enjoyable, this coach kit, could well become the jewel of a train collection.
(I have a long term project for a local 2-axle coaches (?) with open platforms, that allow a lot of people to be visible. There will also be simpler "Chinese" seated figures visibly positioned just behind windows.)
I have worked out brake hose design based on magnetic connections - since this is visible. From a running viewing distance, they are ok in appearance.
I seem to have wandered off a bit into modeling philosophy. ;-)