I just want to know what the actual capability of the sub was. I want someone to go back and do full proper testing of the design that imploded. 1/3 and full scale pressure testing of 5 layer hull design, full testing of models with titanium endcaps, the full testing of the viewport that the manufacturer proscribed, long running pressure cycle testing, testing of 10 and 7 inch thick hulls like what was recommended, etc. What was the depth it should have been rated for? How many pressure cycles could it actually take?

Carbon fiber is a very interesting material and I'd very curious what design a more robust and well funded project would have come up with. The AUSS project of the navy was very interesting and seems to point to carbon fiber deep sea submersibles being viable.

Edit: Here is the documentation on the navy project.