About the Clearview windscreen,
I was very impressed with their return policy. I orderred the +4" screen but their policy is that once you install it on your bike and take a ride, if your not happy with the heigth, ie. too tall or too short, you can return it and exchange it for a new one and get a full credit.
Clearview apparently applies a clear peel off protective plastic to protect the screen. If you can send it back to them without scratching the screen or damaging the packaging material they will exchange it.
You really can't beat that!
Manny