Above 170KPH the Centre of Pressure moves back
I've ordered the Madstad bracket so I can get some fine adjustment, but I think I've found a solution to the buffeting issue.
With the current windscreen setting, the centre of pressure seems to move backwards above about 170 KPH, and you are sitting in a nice little vacuum.
From about 160-180 the buffeting definitely decreases. In traffic things get a little busy, so if I find a less populated stretch of road, I'll report back.
Above about 130KPH things are happening quite fast, so I'm out of my reaction comfort zone by then. Kind of ironic, really.
DL1K , fettled.