Yes, the SWE LD's are all free from DVNR. Like Asaki said, the Technidisc pressing of the first film happened to be from a different print than the other ones, that's what made it so unique. That isn't the case with the ESB and ROTJ SWE discs. But that doesn't make your project uninteresting in my book, I'm especially interested to see what quality you can get out of ANH though, as my capture was done using the combfilter of the LD player, the combfilter in the DVD recorder introduced motion smearing, that's why I avoided it.
Even if there's bigger and better things on the way, I don't think we should stop preserving old LD-transfers if there's improvements to be made.