Sight Glass Retention Screw

[CET]

I've got a saber with a Graflex style emitter from TCSS and I'm currently using a red button retention screw for the blade. I would LOVE to have a "real" glass eye retention screw, as in one that allows light to shine through. I like the ones TCSS has, but they're solid and don't allow light through. To this end, I've been looking at sight glass plugs. Most of them are pretty large, but I think it might be doable. Here's one on Amazon, as an example. I think it would look great, but there would have to be some modifications.

Has anyone else done something similar to this? What kind of solution did you implement?

[oldschooljedi]

greetings.....kal from krsabers.com drilled a hole through the screw and light shown through