The only thing stopping me fitting the aero screens ....which I've had sitting in the garage for the past 18 months ...is drilling the top of the scuttle. There are three large holes lurking under the leather trim which I don't want to drill down into!
Jays. Borghi in Milan mounts the aero screens on a stainless strip that is held in place using the tonneau cover screws. I think the original screws are replaced with something he has had made so that the tonneau can still be fitted. I am going back to pick up the car later this week and I can ask for more information.