The lexan windshield manufacturer says not to use the stock rear view mirror because the adhesive could damage the lexan so I had to come up with another rear view mirror solution.
I looked at several aftermarket rear view mirrors and they generally mount to the roll bar but the top tube on my cage is stitched right up against the windshield frame so I can't get a hard mount around the cage tube.
After consulting with my friend Evan Fullerton, I cut a five panel Wink-style rear view mirror down to three panels for a better fit. Then used the 90deg brackets to mount to the top tube where there is just enough clearance to get zip ties thru between the top tube of the cage and the windshield frame.
Pretty sturdy. Perfect placement. More rear view angle than I've ever had before.