I notice your roof rack bars are in the rear. Do you experience the "drumming" sound at 30-50mph? I did, even with the windows up. I moved the bars forward, and kept them separated more. No more "drumming". I mentioned that to the dealer and they said there was a TSB out about that. I haven't bothered to look it up, yet. They act like poorly designed wings, and the buffeting impacts the roof...like a drum.