Settle down Boys,
Steve everyone on this thread has said valid points, the are not ignorant or ill informed. Just remember that the stress test were done with new airframes and not ones with 100 or so hours on them. That is probably why Jab has put a 40deg limit that they will guarantee. I have a large knowledge of composites not in aircraft but I can tell you than any composite does loose a hell of alot of its strenth at temps above 45deg so that 40 is probably a safety margin. It doesn't fall apart but looses it's hardness and in an aircraft that can cause all sorts of twisting, bowing etc.
Manuals arn't the only info out there.