How does this work?

Game-wise? Once you beat the OE and finish the project that lets you get the rest of the Static Light techs (or use cheats) you can start unlocking OE stuff. Almost all of it requires some combination of Static and Flowing Light techs, along with the occasional other one. Technically? Flags, code theft, cursing and lots of praying to the Omnissiah.

Isn't Flowing Light exclusive to OE ships?

Already solved. ♥♥♥♥, I have TWO solutions, so you can choose. Either use FL on precursor ships or unlock and start actually using OE ships. Or do both, or mod this mod. I don't really give a ♥♥♥♥, though you may want to contact Chiru and Stylish if you want to mod this thing.

Is this compatible with -

Probably, yes. No need to even finish that question. It shouldn't crash with anything, though it's possible that mods that override SOFE may undo the tweaks CR applies. Specifically: bugfixing the civics, enabling OE jobs for champions.

What's with the aura?

I don't actually know. That's from ACOT. However, the OE had access to it but the player didn't, so I changed that. Same with the OE Stellarite techs.

Why did you copy the omega thruster?

In case someone wanted to use their OE ships with Static Light. For whatever reason.

My Herculean overflowed!

You spammed the Aegis of Light, didn't you? Unfortunately, there is not much I can do to stop overflows. Blame Paradox for using ten decimal places for health values. Don't use too many Aegis of Light components. A couple should be more than enough, given that they add ten million HP per type to the Herculean. When in doubt, save before upgrading.