sean vreeland
Newbie
That one is your best bet. Just keep in mind that if the bootloader is locked down as hard as you are saying, your phone still might not work because of the fact that it came with a newer firmware. We are in uncharted territory here(as far as the zmax goes anyway). It is possible that the security check won't allow that ROM to boot because only the firmware that came on your phone and newer firmwares released after the one that came on your will pass the check.
Okay, so that flashed, and removed TWRP, which I can tell because it's the stock recovery, however, same error....WTF?