I inserted hex nuts about 1/4 " high to push the screen angle back. No buffeting. The more upright the screen, the more turbulence is a general rule although venting, flip ups, helmet shape, rider height etc all play a part. Sports bikes have low raked back screens and generally are the best for smooth air flow. I would recommend the 2 nut mod to anyone on a DL as first the port of call. I did this on my 650's (2011, 2016 and 2020) and they were all instantly better for me. I also find the lowest setting best, despite being over 6' myself.