Haven’t seen this posted yet:
http://gizmodo.com/long-lost-laserdisc-found-features-behind-the-scenes-s-1451058117
That laserdisc contains raw workprint footage of multiple takes from Jedi. Looks like all done in Elstree for the Dagobah scenes.
I guess this is surfacing because of the Making of Jedi ebook footage? Hard to say but I can’t wait to see more.