This is a wonderful build. The new coaches match the upgraded Emerald Night perfectly!
I really like the arched door design you've created for the coaches. I've been trying to find a suitable rear door for an observation car I've been building, and I may end up using this design. It's much more elegant than everything I came up with.
Can you tell me a bit more detail about how you've constructed the glass inlay?
Is the glass just (qty 4) 1 x 2 translucent-clear tile with rounded 2 x 2 bottom plate to hold it in place?
Are the two horizontal yellow bands stickers, or are they plastic sprues from small Lego parts shoved in between/behind the tile?