I could not get the lids to open correctly (as I posted in the Discussion Thread), so I started over and this is my second attempt at the entire thing. At least the lids open! I still don't quite understand the Easing process, and I can tell it could use it, but for my first attempt at AE it's not bad. I also had issues exporting the GIF in PS as it kept giving me an error about memory, so I finally got it export at 720x720, as I could not resolve it after hours of googling.
Anyway, it's not perfect, but thank you for the fun tutorial! I love the subject matter and I'm sure will be referencing this class again as I explore AE!