Thanks gotham. The fold-flat is very important to gamers. It's sometimes a pain to develop but very satisfying once achieved
And although I have added more shelves to store and display models, I think I will be on the needing end of this too some day!
In the meantime I have started the texturing of the roof parts.
If you look closely I have added the depiction of the special extending framework joints on the core part as an alternate layer (also for the walls, but I had them built before). I don't remember the Japanese name, maybe one of you will know? I like that pattern very much.