True - the big advantage of the Fairbourne svreen is that one can bolt on a mirror securely through the upper hole of the central pillar. With the Morgan screen, I had to fabricate a mount to fit on top of the bevelled pillar. It's fine for parking but it wobbles like my putting stroke at any speed.
Well, that settles it for me. I need that mirror firmly attached so that it is usable. Fairbourne it is!