[CJE]

There's a French saying: when you want to prove something too much, you just don't prove anything.

Have you ever read on an air combat report the code of an E/A shot down? Maybe that was possible in WWI but with the speed of a D-9 and of a Tempest, this looks very doubtful.
I'm disappointed that Dortenmann did not record the serial number of the Tempest!

Clostermann claimed a few stories that, either happened to someone else, like his fight against a high-altitude Bf 109 over the Orkneys (story that was NOT printed in the original English-language edition - why?), or cannot be ascertained, like his close encounter with a Do 335.