Wow, that's amazing work, I love dioramas. It was an exhibition of dioramas at my local Museum that got me started in the hobby.
I've been to Chatham and stood looking over to Fredericksburg and tried to imagine what it would have been like back then, for me this diorama answers that , almost like having a time machine.
I hope I'm right in assuming that this Diorama is on permanent display so that I can see it in person next time I'm over?