While we’re on the topic of ESB soundtracks, this video (https://www.youtube.com/watch?v=t8MpzMUD4Gg) shows that Luke’s “You were lucky to get out of there” line heard in the 70mm and SE tracks was on-set dialogue. Just something interesting that I found out recently.
Checked through the 70mm in-theater recording and it shows that line is not present. Instead it is “It’s lucky you don’t taste very good” like in the stereo mix.