I also have the quick-detach on my FXSTC. I altered the windshield angle to reduce the wind buffeting, I found the tip on angle on this site... I like the ride a lot better with the windshield on.
Jimmy_K, let us know if the fork bag helps with your buffeting issues, I may try one myself.
Remember, Ride Safe...
After many miles of riding with one on for some reason I decided to pull it off my Fb a couple weeks ago. Now I remember why I have them. I do not see me ever riding anywere other than a parade without one again. I don't care how it looks.