GoPro Hero 4 Black heat issue update

Well been doing a fair bit of testing today and during a discussion in IRC someone suggested looking at the heat sink built into the exiting waterproof cover. 

I have never paid that much notice to it as never been used. Checking it out it I found a metal heat sink that sits around the lens and dissipates heat. 

Well managed to free it from my case and then make a quick 3D print to act as a template for cutting out. Fitted it all together and included a frame to clean it all up and hold it in place.

So having done some more testing, as long as I have a slight flow of air on the outside it has continued to function fine.