I can see that there is a balena-fin overlay in the upstream raspbian repository. Does that mean one can simply download a pristine upstream raspbian image, modify config.txt to load the balena-fin overlay and utilize the peripherals on the fin? Of course wifi will be using the upstream drivers.
Hi! Yes I think you are right there. As far as I am aware the Raspbian we make available for the fin is the upstream with the changes you describe applied, and the proprietary network drivers.