The “Skywalker Edition” is a project made by SkyDude on thestarwarstrilogy forum. It won’t be finished for a very long time though, and last I checked he was still working on a 1080p proof-of-concept version titled “SkyMaster Edition”. D+77, if I recall, uses Skydude’s version of that speeder shot.
SkyDude’s projects are created using only the 35mm print scanned material with the exception of that shot, as far as I know. From what I’ve seen he doesn’t like the official UHD master.
I honestly don’t know who is actually considered part of “the team” if not everyone involved, but SkyDude has helped TN1 on the ‘official’ TN1 releases before.
EDIT: Sniped, that’s what I get for letting the page sit open without posting. :p