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. :)
@pabrognara In the GitHub repo, I've added an example for AiMesh.
If you want to force a channel, you have to adjust the main, Ai-node and global value. I also do this on my AiMesh node.