You gave me an idea, I find it very annoying to put the nuts on the wave guide one at a time.
I wonder how hard it would be to make some kind of like thing to put over the wave guide to position the nuts. I like the idea of a 3d printed bracket shape that has magnets in it, so you can load 4 nuts into holes, have them held in place magnetically, so you can get it started and there is no chance of spilling it etc, then just lift it off. Like a nut starter or whatever specific for the wave guide size.
or ideally two tools, one with 2 pins, and 2 nut holders, and the other with 2 opposite nut holders. That way you can keep it balanced on pins while you put the first bolts on, then remove, and put the other plate on once its already kinda held together. No bullshit. And the pins need quick release slide collets on them too, with like a spring, like the thing you have on sports bags to keep the nylon cord tightened. That I think would be like really good. I need a extrusion printer though because I know the resin parts will be too weak for this. It would be actually aligned on pins by the time you tighten the first two nuts, perfect, not some edge clamp that you guess with (according to the paper its a very small effect, but still, its like a purpose built spanner or something, nice to have even if you can do it with pliers).