Okay! I have made some progress. I think my SD card is now flashed in the correct way. Took some tries. This may sound wierd but my computer crashed, and that i think, is a good sign :)

I will try later this evening.

I also found out that my version of the S9 should attempt to boot from the SD as standard.

And i might not have waited long enough the last time. Tho im pretty sure the flashing also failed the last time.

Lets go!

Stay humble, stack sats.