Forgive my ignorance haha, are you saying your flex cable helps solve the issue with the mux switch so we could use the dp out?
If so, I'd gladly purchase a few of them to help fund the project. You guys are like wizards and I'm just here with my screw driver waiting for a break through haha. I do plan to order a 4090 from X Vision in the near future. It'd be killer to run that card(and the 3080 i currently have) directly to a display, not through the igpu, even if it's bottlenecked from the old 3920xm.
If the flex cable doesn't address that issue, again sorry. I get lost with all the back and forth.