So I feel I have made some progress but currently have very little to show for it. Sharing some of what I have tested here in the hopes that someone else can take a look and fill in any missing pieces. I have managed to get the following orangepizero conf building cleanly in Armbian using 'edge' (6.6.5) and 'current' (6.1.66) but unfortunately neither of the generated images boots. The 'edge' image shows a green LED with blinking red LED after about 10 seconds, but 'current' seem to be a