I hope you'll forgive me for not reading 127 pages of posts but did anyone mention that R2's head pops off his track a bit during the scene where Luke says, whines. "Oh we'll never get it out now.!" When they are on the shore watching the X-wing go glug, glug, glug.
I also thought that some Stormtropper reflections in C-3pos shell would be interesting during the scene where he wanders off and get's shot on Bespin.