Well, that's the way my bike was set up as delivered, and the way all of the bikes with mirrors I've had have been. ???Nick,
are you sure? if you do that -- at least on my 620 -- the wind resistance and vibration is enough to loosen the mirrors. I lost track of how many times that happened to me. I even tried tightening them another full turn to keep that from happening, but it wouldn't make another full turn so I couldn't get the mirror back to the normal position.