This is a tad bit of digression, but it remains a point of interest to me, because I haven't worked out a plausible explanation for it yet - Paul, I strongly question whether that can be the ANH stunt saber in the candid archives photo. That really looks to me like the ROTJ Vader Graflex. There are no details clear enough to be positive, but the proportions match, and the shroud looks wrong to me to be an MPP - I see what looks like the tall black D-ring post on the ROTJ.
The scotchlite blade is a headscratcher on that hilt, and I suppose that would make an argument for that being an ANH stunt, but the dogma is that there were no Vader sabers left by the time Jedi went into production, hence the Vader Graflex.
This photo will muddy the waters further.
I would take that to be what passed for the ANH Vader stunt. Look closer -
That's no MPP shroud, and I doubt that that is much more than a piece of chromed pipe cut vaguely to shape and painted black around the 'emitter' end. Hell, the Vader ANH stunt could have been the first sink tube 'hardware' saber for all we know!!
Another conclusion that I've been slowly creeping up on - I don't think that the Vader-ANH stunt was motorized, or at least I don't think that the motor was used during filming. I just watched the ANH duel again very carefully, and this is what I saw. If you look at Luke's lightsaber, it has a thick, shimmery blade. Obi-Wan's lightsaber has a thick shimmery blade, and you can clearly see the cord. Vader's blade, if you look at it compared to Obi-Wan's, is a bit thinner and does not shimmer.
That shimmer that you see in Luke and Ben's lightsabers are what the motorized blades were meant to achieve (and before anyone says that the blades covered over with animation, I'm pretty satisfied that animation only provided the color. Otherwise, there could not have been 'holes' in Obi-Wan's blade at certain angles.) Vader's blade is MUCH smoother than the other two - I don't think it was spinning. Perhaps the motor was broken and they didn't have time to fix it, or perhaps Lucas wanted the villain's to look different, or perhaps the crudeness of the Vader stunt hilt made the motor difficult to install.
Thread hijack? Sort of, but no - this is at least tangentially germain to the wires in the ESB MPP. I feel strongly that the ESB MPP could not be related to the ANH stunt, because I'm reasonably satisfied that (1) the stunt was
very crude and certainly no MPP, and (2) may not even have been motorized.
Well, sirs, what do you think?