I make my mounts out of electrical conduit, I just cut tabs in the end heat it up and shape it to the pole, then either duct tape or tec screw it on. I've never heard of the Drift before it looks like what I would want, how long does the battery last? Can you connect it to the extra battery pack while sailing?
I haven't had a chance to use mine enough to answer your questions, but the new Drift Ghost looks like the perfect boat cam. I need a housing for mine but the ghost is waterproof to 3 meters with a waterproof remote and preview/review screen, zoom and indexable lens. Rev Petey that does alot of the Sailing Anarchy vids and a lot of other stuff, sold me on it.
http://driftinnovation.com/ghost-uk/http://driftinnovation.us5.list-manage.com/subscribe?u=14a03cd7e83170f115e4c621e&id=f7de5d351d