Thank you very much for sharing the files and your experience!
I just got my first XR glasses, Xreal One Pro, and had your link bookmarked to do something similar. I am very impressed with these glasses.
Looking through ifixit I can't find the Steam Deck's mainboard. Where did you find it?
I am interested in a productized version - but only with x64 boards like the Steam Deck or one of the Framework mainboards. I don't want to deal with 3D printing and all that. The latter are larger than the Steam Deck, though. No battery for me though: I would use it after work, when I am near an outlet anyway.