I'm trying to get a feel for how much wind noise I should be hearing around the doors, right by my ear. It starts around 40 mph and gets pretty loud at highway speeds, say a solid 3 on a scale from 1 (car not moving) to 5 (window down 40 mph). I realize the FiST is based on an economy car and built to a cost, so I don't expect luxury car sound levels. But I wonder if the noise is a design issue or a part / build issue? What have you all experienced?