When I saw this in Ultra Panavision on the Cinerama screen in Bradford a few years ago the Datasat Disc if I remember right had 5.1 audio.
Also I think this was only mixed in 4 track and spread out.
I noticed some black specs of dirt on the front titles and at the end of a reel . The 70mm print they used has changeover cues on.
Maybe the print needed a bit more of a clean before the transfer, this could be the same 70mm / Datasat print I saw in Bradford in 2010.
I will be looking forward...
I have the BD of Flying Clipper and have watched a few chapters and they have done a good job, the only thing I noticed was a bit of dirt from the 70mm print.
I saw this in Cinerama at Bradford and thought this was a great film.