The new cockpit vibration setting in the 930 UI only affects "Car Vibration Mult1" and "Car Vibration Mult2" that control engine vibrations, but there should also be a setting to affect "Cockpit Vibration Mult1" and "Cockpit Vibration Mult2" which control aerodynamic vibration. For example, the only way to fully disable cockpit vibration is to set all 4 variables to zero.