I had the intention that I would put the full size windshield back on occasionally.......... Not a chance! The double comp is really effective at getting the air up and over smoothly. Yes you are more exposed but its more direct frontal pressure, not the turbulent, random battering you take from full size wind screen. and its just so dam sexy! It changes the whole shape of the car. Longer, lower, leaner. Your eye see's the curvature of the cowl, not the big square frame.
Ill most likely never put the factory piece back on.
Jason
