Hi all! Just a question that's been on my mind for a while. As I have mentioned in another thread, I love German tanks from WW2. However, I know from research that their armor plate manufacturing for tanks had some pretty bad quality control as well as things like sabotage and the works. One thing I am curious about is if the alloy they used for their warplanes like the Bf -109 were of good quality. What I mean by good quality is: not extremely brittle, and typically free of defects. I know that this may seem to be a strange out of left field question, but I am hoping to gather some input from the community on the metallurgical quality of the fighter planes used by the Luftwaffe such as the bf-109. If anyone happens to know whether their aviation industry had good quality control, that would also be awesome! Thanks!