Astro,
G-Day....
...Back on topic.
We spent a bit of time on this during the 2 hours of wind tunnel testing at the A2 Wind Tunnel in Mooresville, NC with the designer of my Stohr F1000 - Wayne Felch. The video's taken were very helpful, especially when we analysed the still shots. See below.
https://www.youtube.com/watch?v=9sd91yXelTM
Couple of notables and the changes we made.
The small hole in the Stohr nose is effective.
Windscreen (made from a Bell Helmet shield) dramatically reduced helmet buffeting.
Changed to Aero mirrors.
Added the Dangerous Cargo DRD to the GoPro