Oh, I'm glad you did this. I was meaning to ask you about this. I tried to get OCP to do something about this for DM, but I don't remember whether it made the cut or not. There is one more shot of R2 in front of a Death Star control room background. It is the shot of R2 laughing at 3PO's "I think I am melting" scene.
The rest of the pics are great. One thing that has always bothered me about the matte work about on item number #5 is the shot is still so static. It doesn't really give a sense of height that it could. It would be interesting to see a bit of motion put into some of the lower area. Perhaps something like one of the bridges extending a few floors below and some troopers or some officers walking across. Just a thought.