Making a few more discoveries but there won’t be much more think nearly exhausted the Material now. Spanner in the works a bit for ROTJ…
When Luke Looks down the shaft the mysterious music was meant to show this painting of the Bridges and the core below him before he fights and swings across it.
https://www.google.co.uk/imgres?imgurl=https%3A%2F%2Fs-media-cache-ak0.pinimg.com%2Foriginals%2F0a%2F06%2F8b%2F0a068bb17b80548f789cce9a68299793.jpg&imgrefurl=https%3A%2F%2Ffi.pinterest.com%2Fpin%2F356769601700739190%2F&docid=F4cPFt1C9KIwcM&tbnid=pzMISenQHflaUM%3A&vet=10ahUKEwiUpr62rdrYAhXLI8AKHdddBEIQMwhDKAQwBA..i&w=1280&h=784&itg=1&bih=898&biw=1106&q=death star shaft mcquarrie&ved=0ahUKEwiUpr62rdrYAhXLI8AKHdddBEIQMwhDKAQwBA&iact=mrc&uact=8
(Probably) The effects that follow the Emperors Death is the Start of the Chain Reaction before the Death Star explodes so this probably replaces the Tarkin thoughtful Repeated shot.
No time difference
Rough Idea for Star Wars Extra Extended Edition
Include some special edition scenes but discard others (i.e. Mos eisley cartoon Dinosaurs and Jabba the Freak + stupid cantina revisionism)
Make new edition that is better and actually add something and enhance.
Attempt to work print sections (chronological versions that are slightly extended or shortened)
Extended cut but only in terms of the theatrical edition.
Add cut music and sound effects.
Use Alternative footage where it is interesting.
Add only Feasible Deleted material.
If it ends up + 1 minute it would still be good.
My thoughts are if what happens in the roughly the same amount of time is better then it will still be better.