Part 1 here...
Here's the current state of the DIY goggles. The distance to the screen seems about right for use either with or without glasses.
Next steps: make a lightproof cover, figure out how to attach the battery and wiring, make a convenient connector to the receiver.
Update: Somewhat punting on the idea, although I still like the idea. I broke down and got a Fat Shark Predator V1.