Daniel The Wise

I help a lot, but can help everyone whenever they want. Your request is also far above contract you have.
 

Perhaps it looks like like a irrational decision, but its not -> crappy and wrong(!) manuals, low quality product and incompetent people have great potential for huge waste of time if you go that path. I have to remind you that dealing with (this shitty) hardware and with you is 99% sponsored from our private pocket. If you have problem me not helping you, read as "I refuse or don't have to pay for dealing with you".
 

  Here, people will gladly help you. Ups, they want money for wasting their time. That's really strange, right?

https://www.armbian.com/get-involved/
 

Those are user land limitations, but what you are looking for is below. HW encoded limitations which are set in the "bios" / u-boot. Ergo. I limit scope of your search, send you to I am sure correct destination, but from here you are on your own to find and change/things.