@CaseySJ Update on my PTT situation. I tried flashing official F9i through Qflash but it said invalid file, tried both the one in this thread and the one from Softpedia. Then I booted Windows directly (not through OC), installed Gigabyte bios updater and that was able to do it. Since it worked I ran it again but also updated the backup bios (I have a suspicion I somehow screwed that one up with the failed modified F9i). Then loaded safe defaults, set PTT to enabled, save&restart and... BOOM, it stayed enabled
Is it possible that my failed flash (using the complete setting to update Intel ME and stuff) didn't get fully fixed by manually flashing your bios and the Gigabyte tool was able to correct that? Can't think of any other reason since it was literally the same bios.
I also noticed that before flashing now, there was no Intel ME available at all in Device Manager in Windows. Haven't checked yet if it's there now since I wanted to make sure MacOS booted correctly first. Will update.