Following instructions are provided without any warranty, and may even get you in trouble legally. The instructions are provided for testing, learning, preventing e-waste, and should be use with care. We (including contributers + commentators) are not responsible for any damage to your device(s) or any legal issues.
Instructions have been moved to https://github.com/francoism90/asus-router. :)
The good old RT-AX88U (not Pro).
I have the original "nvram set acs_unii4=1" in the script, but that makes no difference, even if I set it to 0(zero) or comment it out.