D, I couldn't see the photo before and now I can. I did get your PM and am interested/willing if Scotrod doesn't feel he has the time. I do not have any of the buffeting that Scotrod mentioned however, nor the back pressure so I won't be any help in that regard. I do get a slight wind in my face (think maybe sitting in front of a household fan on medium perhaps) but I think that is by design/to be expected to a certain degree.
My only ongoing issue is really this damn whistle, if there was no whistle at this point I would give the Madstad a solid 10.
So far my attempts to solve have been:
Foam weather stripping along the base under the bottom edge.
Rubber gasket under the robo brackets where they meet the base
Masking off the "nostril vents"
Masking off the edge where the base meets the cowel/dash
Masking off all holes on the robo brackets
When D mentioned the squeak I realized mine did it too,but that was solved by loosening up the bolts a little and adding a piece of a rubber innertube at each top corner of the shield. Alas no change in whistle.
Whistle is present in both an EXO-500 and a Shoei Qwest, so helmet has been ruled out. Also present regardless of if I use the 11" or 13" shield, and regardless of height setting of brackets.