I'd already messed around with the screen angle in an effort to reduce wind noise before I fitted the GPS but it didn't cause any buffeting.However this is a very personal thing and what suits one rider seems not to work for another, some people rate the Dakar screen in the standard position whereas I hated it!
I eventually solved(well nearly!) the wind noise by cutting the top lip off the screen which gives a much cleaner and quieter airflow.
The whole OEM instrument/screen/headlight mounting is pretty poorly constucted in my view and does vibrate around over bumps or off road which is even more noticable with the extra weight of the GPS so I'm not sure if it would be suitable to fit a RAM mount without some reinforcement.
Tony