I'm tossing up the idea of getting a camera, the GoPro fits the price but i'm concerned about helmet mounts and re-usability. I'll be mounting it to a full face helmet for the filming of BMX track runs at several events where I would be approaching a rider to where it. How easily removable are the stick on mounts? And how much are they as I would assume I would need over the course of a season several which would be used and then ripped off and thrown away.