This vent repair is for fixing ability of vent to direct air to left or right side. The main slider plastic detached from internals of vent, causing the vertical slats inside vent, to close and not allow air into the side of car.
New vent cost was into hundreds, so decided to put my own touch on it.

Work slowly and gently. Plastic breaks easy, so slow is fast here.
Hope this helps.

 

..more pics...

 

Well done sir!

 

nice work, you've been busy :-)

 

Great work!