On my old Nissan Sentra SE-R Spec V 2002, isolating stuff (like foam) start to get out of the vents. After a while the dash (up) and floor (down) control were blocked. And then some day later, I was unable to move the vents and they were blocked in position. It was a known issue corrected under waranty.
I'm not aware of any problem like this on the twins. At leats the sides are still working... Get rid of the center vents and put some nice gauges!
