Next Attempt Results
Ok....
cutting down super long story short.
worked on car for two hours...
got some magnets - however these magnets are not so strong (not neodymium magnets).
the big problem is to shove the magnet inside..
attaching it to a tie wrap doesn't allow it to go all the way inside.
Using a string does allow it to go inside, since the duct bends to the right 90 degrees...
After several different attempts, i got it deep down inside.
Some more playing around (pulling and dropping), and the tweezer got attracted to the magnet...
I pull up very slow and it drops...
Got attracted 3 times in total, and the object fell down whenever i tried to pull up...
I thought the magnet was weak, so tied two magnets together and sent them down with difficulty....
This time the object got attached to the magnet, however it fell down again...
This time it feel down somewhere else deep inside. the magnet never attracted the object again.
i removed the magnet.
As a good news - i can set the knob to fully front vents, and now out of 100% air, only 2-4% of air leaks from the foot vents...
Almost no air leaks from the foot vents or maximum 2-4% of total air comes out from foot vents....
So i can say problem solved.
Some pictures/videos attached here
https://www.dropbox.com/sh/sfmnjzejumxj2fm/NVZuyDsUoL
If someone knows how to remove this assembly to see the fins, let me know, i will open this section more

. As a note - it is CONFIRMED that the object is behind this black thing, so if i can open this, i can remove the object by hand.
My current guesses say that, no magnet or vacuum and remove this object, and only removing this black thing can allow the object to be removed by hand.
Concluding - the object does not affect me anymore, because i got 97% normal airflow. However if there is a way to remove it "by hand", i will still do it.