well...being the European racenut that I am..I always noticed that the cars have rear diffusers on then..(F1/ASTCC/BTCC/GTCC etc etc..I know that Tamiya makes a rear diffuser for their old style F1 cars but have never seen one for the newer cars..being that in theory RC Cars run thru the air the same way full size cars do I was thinking if a diffuser would be an advantage or not?..I have some 1/8thinch CF and was curious what youre thoughts were before I begin building one....Thanks.