Well I had two big bleeding sessions. Gravity bled, then pumped pedal 20 times, power bled. Then waited half an hour and repeated.
No change whatsoever.
Guess I'm gonna have to drop the transmission again, not sure what to actually look for though.
I'll triple check that the disc is the correct way around and that everything is still tightened to spec. What else can I check?
Slowly losing my mind with this now ugggh.