Are you positive the whistle was from the flyscreen? I had a whistle on my CB that sounded like it was coming from the front somewhere and it turned out to be the shield on my helmet.
My experience has been that my helmet whistles louder when I an on my CB compared to my supermoto, so I think it's just how the air is flowing around my helmet. When I cover the vents above the face shield, the whistle stops. A bigger screen may stop this as may a different helmet. I was thinking I might buy a new helmet, but mine is still fairly new and find it comfortable, so a different screen may do the trick at a lower cost.
I know... You just can't decide.

(01-09-2015, 03:10 AM)The ferret_imp Wrote: [ -> ]I know... You just can't decide. 
No, I'm good. Getting the larger screen because I wanted more wind protection already.

It would be fine if it will be possible to change the Dart to the new Marlin screen simply using the existing brackets. For long distance journeys on the highways.
Greetings
Gustav
(01-09-2015, 03:55 AM)Gustav_imp Wrote: [ -> ]It would be fine if it will be possible to change the Dart to the new Marlin screen simply using the existing brackets. For long distance journeys on the highways.
Greetings
Gustav
I have the impression that the Marlin screen will fit existing brackets. I will email Steve at Dart to confirm.
I just got my dart flyscreen tinted for my 2014 yesterday! I notice a whistle but I've always had that. Takes a good amount of pressure off my chest. I'm tall too so the turbulence hits my shoulders not my helmet. Love it!! Only complaint is the headlight reflects a little bit off the shield. I was highly impressed with the price, construction, packaging and delivery.
man am I glad I saw this thread, I had no idea Dart is coming out with a larger screen,I will get one of those for the longer rides,it does look like it will fit the same brackets.

when you guys get the larger dart screen, will you please post some pics...... thank you
I emailed Steve at Dart to inquire on whether the larger screen is compatible with the current brackets. It will not be, but these are easy enough to switch out. If you do one side at a time, it should keep from messing with your headlight adjustment. Can't wait until March!