Took a winter break and am back now On your last questions: The GoPro is rechargable battery powered. The charge doesn't last too long, though. I think there is an extra battery pack you can add, at least for older GoPro versions - the 8 has no separate casing anymore. I also really miss the engine sound! When a GoPro is right in the wind, you will hear only that from a certain speed on. I will be trying some microphones, though, fingers crossed. Yes, I'm wearing a chesty here. Actually, it's a bit funny to put on when you're wearing a stiffer jacket It is certainly no good in terms of safety if you crash because it is right on your chest. You should also check the camera angle as you're sitting (incl. hands on the handlebars) to make sure you're filming not just your tank or something. Other than that I like it quite a lot, I find it more dynamic than a tank mount.