So I thought I'd share my new rear view mirror setup. Tried it out yesterday and it works great
I had the small mirror part you see stuck to the roof (it's one of those aux adhesive mirrors from the auto parts stores), but I could only see things that were really right up on my butt, so something better was needed. AZ law states that to be street legal, you must have one...not to mention that you really should have one for courtesy reasons, but the 500 doesn't have much room, and problems exist.
I don't like the side view ones because they get broken, though I may try that in the future and just leave them loose enough to fold away. The trouble with a fixed one in the center is that while they work and are cheap enough, I tend to hit it with my head due to the space constraints in the 500, esp when going for the parking brake. Hitting my head against glass often seems like a bad ideal.
So...I removed the old adhesive from my existing one, and carefully pried the mirror out of the housing (I don't think this is glass...Seems like plastic). I then drilled a hole in the center and inserted a machine screw. I found part of an old phone mount in the seat of a used car I was working on, and drilled a matching hole in it with a wing nut on the backside, then reinstalled the mirror.
I then used Velcro to attach it to the roof, so if I did whack it with the old melon, it simply breaks away...and can be removed for trailering. The roof does shake a bit at idle, but the main goal here is keeping an eye on machines that are behind me, not reading novels laying in the bed, and at speed it works well.