Do I let the already existing Start_Hourglass9.bin file and just add Hourglass9.bin (https://github.com/d0k3/Hourglass9/releases)?
no delete and replace Start_Hourglass9.bin (rename new Hourglass9.bin to Start_Hourglass9.bin)
Soundhax and OOTHaxs work?
yes, but hbl won't boot because payload isn't updated yet