In search of a brave man (or woman)
After a weeks worth of work, I have a development fork release that
should support the AC68U rev C1 and E1. It's loaded on my AC68P router right now as I type this message. Unfortunately, I don't have a later rev AC68 to test.
So, looking for someone with a later rev AC68 to give it a try to see if I should continue. You will need to load the code via the Firmware Recovery tool just like the current fork supported routers, followed by a factory reset and reconfigure. You should also be prepared to use the FW recovery tool to get back up and running on your previous code if something goes wrong (If it doesn't work, it's likely the router will not complete boot or will enter a boot loop).
Please respond via PM if you are willing and able to help. Thanks!