Bulloch never did Boba's voice, it was Jason Wingreen. The saber issues, with the possible exception of Luke's green saber, are a result of the averaging out of the contrast over the scenes. If one bumps up the contrast levels then the white cores of the sabers return, but obviously this makes the rest of the film look rubbish. Ideally things like this should have been corrected manually, but as Lowry were only given thirty days to restore the films one can hardly blame them. I think Lowry himself was quoted as sayng that if it were up to him they'd still be working on the transfers. It really annoys me that we were denied the films for years for no good reason, only for them to be rushed out because of 'piracy' concerns.