Installed Inno fairing (medium) this week. Unless I'm retarded (likely) the medium Inno fairing Does Not Fit stock cross bars. You actually have to move the outer clamps in a few inches. Pictured below. I just drilled holes. I'll cover it with some sort of sticker or something - or not. The middle of the fairing sits off the car maybe 1/4 of an inch or so. Not much but its not flush.
Here is how it looks - celly pics suck I know just got off the lake, sorry!