WOw!! Those must be some extremely valuable discs by now, thanks for the info, I never came in contact with any of 'em and had no idea as to their existence. I think for run designation guesses though you won't see too many more of them out there so it still should be safe to assume that a clear CE disc is of the last run? I guess it's also safe to assume that their light weight had to do with their translucency?