My S-FD works great in the wind as well as the C lines. Gusts up to 20 yesterday and they held the lines perfectly....or at least as well as I threw them.
I have thrown the S line in gusts at or above 35mph and when I threw it nose down on ling drives, it acted like there was no wind at all. Nose up or flat and it was to the moon.
My 172 C-FD is noticeably firmer than my 168. The 168 flies great for me. Have yet to throw the firmer one.
Keep forgetting to throw it in the bag. I don't doubt its as good as the lighter one at the very least. I just hope Innova doesn't screw these up tinkering with them as they have with so many other molds. That is my biggest worry with these. May be prudent to buy a huge stack before too long.