[So I would not say the Japanese were the biggest overclaiming because they were not on the winning side]
I just said that they [the japanese]made the biggest overclaiming because they didn't have a truly verification system...and what I meant was that, Japan overclaimed, but they were losing a war and the Soviets overclaimed too but they were winning a war...an interesting point that, perhaps, deserves close attention, indeed.
On the other hand, I agree that the german overclaiming was minimal, just as the American and British overclaiming was minimal as well, and they (the Anglo-Americans) didn't need to overclaim, their system worked quite well. It is just that you cannot win a long war with a few experten. the Anglo-American system, designed to win a long war, was very effective indeed. It is better to have some aces with 5.33, 8.83 or even just 1 confirmed kills who survived to teach others how to do the same than to keep your veteran pilots flying time and again, almost restless until they were killed, although, of course Germany had no choice in this regard, anyways.