Was wondering if anyone actually mimicked the Cali Sci cut out on the stock 2010 up screens?
Yes I have. If it's back pressure that is your problem (in the raised position) then this helps, but for me it did not eliminate it. The CalSci medium also did about
the same for me, maybe not quite as good as just cutting the hole in the stock '10. If buffeting is the problem then I have no input as I have not experienced
what I would call buffeting except in strong cross winds.
From my two experiments with cutting the stock windshield I prefer this one (seen below) where I cut a large round hole or cutout extension at the bottom of the shield.
Still not there for totally eliminating back pressure in the raised position but the best I've encountered so far.
This is the only photo I have of the preferred (IMO) stock screen cut out, click on it and then again for the full size. My bike is the one on the right in the photo.
(and yes I'm aware that it's past time to flush the brake fluid. )