@ljo: just don't forget to

* make all updates on stock first. As there is no Android 10 yet for Tama devices, as far as I know, you are free to accept all updates.

* check on stock that all works. Take time to do so. Otherwise you may have issues with warranty

* unlock and loose your stock camera.

* either start with Sailfish or AOSP flashing. AOSP will give you preview of what to expect on SFOS.

Depending on how it will go with SFOS, we may need to check some things on AOSP as well (hopefully not and we can do it simpler).