I have a setup from a MGB. I bent up a custom top bracket from Alum. angle to fit my windshield channel and the Rick Young soft top. When I was done the back of the adjustable mirror mount did hit the glass. I put a small layer of protective film on the mount where it hit the glass to stop any contact that could hurt the glass. I used this to my advantage as it keeps the mount square with the glass. This allows me to use the ball & socket to aim the mirror while the mount is at 90 degrees to the glass.