With the knowledge I now have, I believe you can emulate the ASUS routers on both the Tenda AC15 as well as the Tenda AC18. You will just have to compile a custom CFE, utilizing the real Tenda Variables in stead of the ASUS variables, together with something like the above modifications.

If someone has a Tenda router, my suggestion would be to do a NVRAM dump. Then update the variables in the vortex CFE with the Tenda Variables... but only use the ones used in the Vortex CFE. Not necessary to add other variables. Flash your Tenda with your modified Vortex CFE, and then your Tenda router will also be an ASUS clone. (This is my working theory.. unfortunately I don't have a Tenda to experiment on)... maybe some readers in this group can comment, or do the experiment and enlighten us all.

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ASUSWRT Merlin Build 384.5 or later ON Linksys EA6900 or EA6700