Mate. Thanks again. Honestly, really appreciate all the info. Frustrating for sure and not 100% sure how best to get it sorted but that helps so much to know the specifics around it.
If only when it failed it defaulted to the articulating vents instead eh?! Surely whenever you turn the 'rear' on people generally want the air back there and if it went to the articulating ones then it can be individually controlled from there anyway, so definitely frustrating it fails the other way.
I think after all the investigating and work you've done, and replacing the motor and it still failing, that sticking the flap into that single position makes total sense. I personally don't want it to function in any other way. Have to see if I can get someone to look at this for me