Replaced the standard Zuk shield with a Givi last week. Wow what a wonderful windshield and only $101 at RLmotorcycles. The calm air, the no buffeting, it was like smooth air heaven. But this was short-lived as soon my Madstad mount allowed the windshield to tilt back once I reached speeds above 70mph. Stopped, retightened the wingnuts, back on the road and wham the shield rotates back again. Stopped, took the wingnuts apart, cleaned the washers and lock washers, retightened the wing nuts, and back on the road. This held for about 5 miles then again the shield rotated back again. I realize that the larger surface area of the Givi puts more strain on the Madstad bracket but I was under the impression that the madstad was up to the task. Has anyone else experienced this problem and how did you solve it? My system has the twin wingnut configuration and I have really cranked it as tight as possible.