I'm interested in getting a housing for my sony HC7 camcorder. I'd like to keep it as inexspensive as possible. i met the guys from equinox and the housing seemed sturdy albeit heavy. I was wondering if they work well. How do you set the white balance underwater? If not what should it be set to prior to entering? what do you use for lighting? It'll be used at guadalupe and then next year on a tiger shark expedition.