Thanks guys, hope to get to EC on Saturday and see how the new set up feels on track.
Stuka, the benifit of the ducting is less air under the car at speed. Less air under means more downforce.The ducting starts at the bumper, with all air channelled out of the bonnet.Also works like a wing to help with downforce. Its pretty common practice in sports car series.
It also helps with cooling and 'wow' factor.
As far as testing goes, it is very stable up front at OP and Wakefield but my visit to EC will see if there is a advantage in the higher speed corners.