Woosh

Hi, I'm going to buy a camera helmet soon and need some advice. I'd like to have a top and side mount, so i can have a still and video camera someday. But i also want to use that helmet on freefly jumps. Those flat tops of some camera helmets look like they might create a lot of pressure when flying headdown. Is that going to be a problem? What's your experience with this in general and what's your experience with Tonfly's CC1 and Solar Converter concerning headdown flying? Greetings, Hannes