I like my mod ALOT!!! I am not the originator - I got the idea from other riders here on AdvRider (do not rember who) and they have done it a bit differently I believe. I decided I did not need to trim anything on mine (I believe some of the others have).
See if we can get Bojangles to chime in as we swapped bikes while I was down there. If I remember correctly, he said he could feel a noticeable difference from his (stock).
I am 5'10" with an average torso and it puts the air right up and over my head (for the most part) which is very nice in rain too.
I picked up a stock F650 windshield from A&S here in Sac to mount. Give me a bit and I will post pics for you.