i haven't heard of anyone with the cal-sci having the support brackets broken. Mine are fine after about 10k miles.

There is probably less force on the bottom bracket than with the stock shield. I doubt there is any more force on the top bracket than with the stock shield. There is certainly less movement from turbulence shaking the brackets.
My best guess of the load on brackets from testing windshields is:
- Stock in lowest position is very low.
- Stock and CalSci X-large in normal use are similar.
- V-Stream load is higher.
- Cee Bailey is even higher with the +1+1 I have. Larger sizes than that are probably what are actually breaking.

The Aeroflow transformed my 12GS. The buffeting and noise were obscene with the stock screen. I've had it on for 2 1/2 years and 30,000 miles and I'm quite pleased. Well worth the money.

BTW, do a search and you'll find lots of windscreen reviews. You'll also find my review of the Aeroflow that I did a couple of years ago.

Large Cal Sci. No support arm problems in over 6000 miles.

Another 6'1" V-Stream owner and I love mine too, and it doesn't spoil the lines of the bike.

I am 6'6" and on my 05 the Aeroflow worked very, very well.
The Cee-Bailey Sum-Vee was my summer shield.

Anyone ever go from a Cee Bailey to a Cal-Sci or vice versa. I have a Cee Bailey Euro +4 or 4.5 that I've been riding with for years. I'm 6'3" and it is a big improvement over stock, but I'm wondering if the cal-sci is even better with the additional vent slots and what appears to be wider shape?

We've had some mention of support arms, so let me share my experience with my (demised) Cee Bailey. Worked great for a couple of years, reducing noise/buffeting significantly. Then, on a severe bump, the two bottom brackets let go, dropping the top of the windscreen in my lap. Turns out the metal bracket which controls windscreen height (electrically adjusted) had been overstressed and snapped. Point is, going with a taller screen than stock may exceed the design envelope of the windshield assembly. Just take this into consideration as you consider non-stock screens.

I second this statement, the exact same scenario for me.

I just received my calsci windscreen Friday and took it out today for a test run. Best adjective, wow! It has to be the best windscreen I've ever had for eliminating back pressure and wind noise. I'm 6' tall with a 32"+ inseam running a medium windscreen. No affiliation with calsci but wouldn't mind an under the table kickback

calsci is great except I had to use the original to pass state inspection. 6'4" 35" inseam, large windscreen (tried extra large, it was TOO big)