I had the option to go for a 3rd party housing which was more expensive, but I couldn't figure out the benefits. Now I know, it has a screw thread on the lens port so that you can actually put special/wide angle lenses on. There's no space inside the housing to add a lens to the camera, and I don't think there are any addon options for the Canon housing I have.

There isn't really an issue with snagging with the lines I have. The jerkyness is down to me deliberately unspooling one line to "catch" up with the other line. Potentially I think that the blue line is more stretchy than the white, which is causing the blue side to lower quicker at depth. I'd thought about using diving line reels, but the issue then becomes winding 2 at the same time.

...actually, thinking about it, I guess I could use 1 reel, with some kind of system which separates and holds the 2 lines apart.

I'm currently getting frustrated over the videos and trying to stitch together frames to make a panoramic profile view of a pylon. VirtualDub is excellent for extracting the frames. I'm taking every 5th frame, and then deleting duplicates or blurry frames. it's giving me pretty good shots. The problem is with Hugin, which I'd hoped to use. It just keeps freeing and/or crashing when trying to align images. Photoshop seems to actually be able to do the job, mostly...

It's looking good mate, have you tried manual alignment mode in hugin? You'll have to match a few spots on each pic, takes a while, but you can get some really good results.

I've tried manual control as hugin is less able to spot overlapping parts, but it seems this is what is making hugin crash (if I pick a group of images that it can detect control points for, it makes a panorama, it's just really rubbish). Overlap isn't a problem as I've kept a lot of frames in, the picture above is something like 60 photos!

I will need to sit down at the weekend and have a good look in to hugin to try and figure out what the problem is. Could be a 64bit issue...

Hmm, good point. Will give it a go tonight. I did notice that the one successful pano was all skewed up and took a lot of manipulation to get it to look even remotely like the above image.

Yeah, I think we're looking at the GoPros with a 3rd party flat housing for a proper project at uni now

I've just picked up a box with 3x GoPro HD Hero 2's, 3x Dive housings, 3x battery BacPacs, spare batteries, memory cards, and tripod attachments. I've been asked to test them out before their deployment on the surf reef

My main concern is if the housing floods while testing 

My concern is that we have the battery BacPacs. My understanding is that I'll need to replace the dive housings back cover with the BacPacs cover = more potential for flooding.

It's really just a paranoia that I'll break some stuff that's not mine, before it gets to be used for its intended purpose

Hmm, that's reassuring. I find it odd how little information there is on the net. Would have thought descriptions would say "comes with interchangeable back covers for waterproof housings" etc. It may be obvious once you own one, but when doing the research for the initial purchase it's a bit confusing!