Having read his fascinating book and articles about the recently defeated Luftwaffe types I have always thought he was a truly remarkable man..As to the sheer number of types flown well it was helped a lot by the time -are there anything close to 400 plus types in the whole world now or even over the last 20 years. Flying them is one thing surviving, as more than a few were reputedly real widow makers, given the exigences of wartime and test flying in those days is even more remarkable
Its an oft over used phrased but 100% true of this gentleman -We will not see his like again
PB