Hi chewitt, I tried your build and the 12.2 last stable build but they failed in the same way. I successfully installed the Legacy 9.2 LTS.
I don't have specifics: the installation appeared to be working, but then it froze on the splash screen (which was graphically altered/corrupted). pressing the power button said something about the shutdown binary not working?
Il tried to ssh in but had a error connection refused error. even though I added ssh as bootarg in uEnv.ini.
Also the dtb reference in the build you provided in uEnv.ini is faulty : the word neo is missing.