I tried to order an A620, but they were not available from the Canadian distributor until the end of June. Also tried for an A660, the improved A600/A605 model, but again not available til end of June. Since I need a windscreen for an upcoming trip, I opted for an available A605 clear windscreen. I'll see how it works for me. If I find that it's not right, I'll sell it locally, then try to order the A620 when it's available. But, you know, I did like what I read about the new A660 on Givi's Italy site (thanks to the translation from a google search). The A660 looks to have a more rounder front, and more pronounced deflector lip at the top of the windscreen. I think I might prefer that model to the A620.

I did find a good installation tutorial for the A620, that was posted by someone who mounted it on a Honda Hornet CB600F. There is a lot of good info there.
Here is the link:
http://www.als-place.co.uk/hornet/how_to/windscreen.php?page=1


'06 Speedmaster, Long TORS, rest is stock (for now)