I'm going to try to make a Replica of Xavier Institute. gonna be HUGE!
I have this book. Ultimate Guide to the X-Men. it has the total details and workings of the mansion, gonna be 2 storys inside and out, with removeable topfloors and roofs for inside play. not gonna do the underground area though. way too much work. what do you think I should use for the walls?

I remember that someone did something like that around here on the realms. He didn't put any details on the building that I last saw, but he did have it so the clix could go into the roof. If I find out who it was and a pic I'll let you know.