The Coronation Egg blew me away because of the carriage inside the egg. It was an exact working replica of the carriage the Czar and Czarina rode in for their coronation ceremony. It had windows of rock crystal and a suspension that actually worked. This egg inspired the color scheme of my egg and the placement of the jewels.
Honestly I had forgotten about the Hoof Egg until I went back through the book I picked up at the exhibit with many pictures of the eggs. The Hoof Egg confirmed that attaching the legs directly to the egg had a precedent in the Faberge catalogue and helped me hit on the idea of using horse heads as the legs.
The stained glass came to me, because I remember all the enamel work on the eggs and I was trying to think of how I could recreate that effect. The glassy look of the enamels reminded me of glass, which led to the stained glass stuff I have in the basement from a class I took years ago.
I added a small little figure with a king of the sea motif. It just seemed to fit with the neo-classical (I hope that's the right period) of the egg. It also provides a focal point for the egg.
I first published this as a slide show, but finished a full intructable version to answer some questions regarding its construction.