What sort of pegs do you use Dave?
I have a mesh diffuser which I've used when Mrs. W faces a long passengership. It makes an enormous difference to the buffeting and makes conversation easily possible up to about 75/80. It also gets very dirty on the rear face showing it does block air flow.
It's hardly ever on the car though as I actually like all the air movement without it.
Incidentally, mine is a bmw convertible mini rear diffuser. It's a foldup thing that slots into the folded easyup perfectly. No need for mountings at all.
Nick
