Thanks, folks! The most time-consuming part of all the upgrades was definitely all the little grip screws, but they make such a huge difference!
I did get some aluminum Tee for the grips, thanks for your help with that, Kurtyboy!
In the end, though, I modeled and printed my grips, and I made a decision to have them all be the same. For so long I had wondered and theorized about the RED on some of the tracks, and the way I achieved mine was a happy accident. In sanding and filling the printed grips, to make them look nicer, I used some Bondo spot putty. So I simply let some of the Bondo show through the black in certain areas, and I felt the look was pretty convincing.
I think the only other details that I may eventually change would be the aluminum control box rails (have been meaning to mill some from thicker stock), those tiny "Telegraph" screws, and I'm still not 100% sure one way or the other, whether the slimmer sides of the box are angled (like I have them, and like they are on the Energizer saber) or straight.
I wish I knew what the heck that part is under the "clamp" card, on the real one!
This is definitely a weird lightsaber, but I do like it. It's short, for a Vader hilt, that's for sure. And I will say, if there were never any Graflex Slave units made that had those "Telegraph"-era screws, and what was actually used was a cut-down "Telegraph" top, I'm sure as hell NOT EVER gonna chop MY Telegraph top! I'd drill and tap the holes in a regular Slave Unit before I did that! Heh