Originally Posted by Rich Lew
I have this same problem with my C3. Someone who wrote a review for the C3 helmet on Revzilla suggested putting a furniture slider, which is a soft felt disc, over the faceshield hinge bolt inside the round recess. This apparently would create additional tension against the faceshield and make it harder for the wind to push the faceshield down to the closed position. I am going to try this out and report back, starting by putting one on the left side of the helmet. If you want to see a picture of the furniture slider, google "Waxman Furniture Slider".
I tried this cheap hack and it worked. I bought the furniture sliders and built up a few layers until there was enough tension against the faceshield. Now it does stay open in the first and second positions even at highway speeds. Here is a picture of the felt pads with the faceshield removed.