I have an interesting issue that I've had for almost a year now. It's almost directly caused by my load bars, BUT only with running a wind deflector attached to them. Essentially what happens is that while I drive down the freeway (it only happens at highway speeds), I can HEAR and if I put my hand up to it, feel my sunroof glass flexing from the air pressure above it. I'm almost certain that turbulence is being created right above the sunroof from going over the deflector. If stopped and I get out and place one hand on top of and one hand under the glass, it has some vertical play to it at the back of the glass, about a couple millimeters or so. I'm afraid sometimes that either my glass will shatter from this, or be ripped completely from off the car. I know the easy solution is to take off the bars when not in use. But how can I go about checking and making sure that the glass is securely tightened to the track and itself. The glass moves and functions completely normal. Has anyone else that has load bars WITH an air deflector experienced this?