I spent an hour or so trying to think about a way to DIY one of these. I ended up with two concerns: first getting a smooth pan on the camera and second with the money I've spent on my boat, I don't want something ghetto up there looking like crap and especially no chance of any rust issues into the carpet below.

So I figured I'd just bite the bullet and spend the money. I'd love to see a nice DIY come together however.