Please share a sample of your videos with us all. We'd love to appreciate your work.Find me a dive site as good as this in Scotland and I'll go film it. Hodge Close Quarry - Extreme Location Diving In The UK - DeeperBlue.com
Why on earth isn't your head steady? Why would your head bob about? It stays still with the rest of your body, and also tends to move where you look, which is precisely where you want the torch and camera to aim.
As I said above, fins only give you a 30% speed increase, not worth it.