G'day All, and special thanks to
@dolgarrenan for this awesome and very informative writeup....
working away to get this build working also, seems to be running quite well though after flashing the modified thunderbolt firmware I've also lost DisplayPort encapsulation.
I've the Gigabyte X299X motherboard with a Radeon VII. prior to flashing I had the monitor plugged into the motherboard TB3.
Post flashing. I no longer have an image, though macOS does detect the USB devices connected to the monitors USB C output. (Speakers, iSight camera, mouse, keyboard etc are all functioning)
any hints in order to reactivate this lost feature?