Following up with a necro update lol.
Picked up a EVGA RTX 3080 FTW3($650) now that GPU prices are back to reality.
Ran into some differences between the build posted above.
So MKII S1 the GPU is mounted 2.5mm higher then MKIII S1 and my RTX 3080 hyrbid FTW3 has 3 power connectors instead of 2...