I have 600 miles on my 2021 Ultimate with the tip out. I have been running it open on tough and rough trails and despite a lot of bouncing and pounding the windshield is doing fine. I have run it open a few times over 35 mph on a gravel road. Just hit breakin so have not run it fast but not afraid to do it. I am having a problem with a serious rattle by the windshield wiper motor and cannot stop it. Dealer put in a new motor and did not solve it.
Finally solved the rattling problem. I had the windshield open and was ”hitting” the front corner of the windshield to try to simulate the rattle. I saw that the passenger hinge was bouncing. Not sure why I did it but I took a flashlight to shine on the hinges to see how they are mounted. On both hinges there is a set screw that can be tightened with a Allen wrench. The one on the drivers side was tight and the hinge was tight. The one on the passenger side was about 3/8” out so I tightened it all the way like the drivers side. That stopped the hinge from rattling and the rattle by the wiper motor. I took a ride over a washboard road and on a very rough trail and the rattling is gone!!!!