I also fitted the rear view mirror which clamps onto the windscreen centre stay. The stay is designed to hold the top of the windscreen frame down when a soft top is fitted which at speed, pulls up on the top of the frame. Unfortunately, whilst it will no doubt do it's job, it's not tensioned at rest and allows the mirror to wobble a bit. I'll have to sort something for the IVA test as I understand a "wobbly" mirror is a fail.
Sorry, just realised how pointless this last picture was, it was meant to show all the mirrors mounted but if you look closely, you can just make out the rear view mirror fitted at the top of the screen. I'll sort out a better picture next time.