I tried the 04-on Dakar screen which was worse than useless. A German chap had a Wunderlich and was good enough to let me have a go...better but still got a lot of helmet buffeting.
I found the pre04 Dakar screen was the best of the bunch but would need major surgery on my bike of course.
I`m sure there is a combination of screen + fittings that would do the job but to be honest I`ve gotten used to riding without a screen and like I`ve said, its only a problem on a windy day at Mway speeds.