Found this illustration included in a YouTube "tutorial" on extractor tuning. I've tuned all my .45 extractors using “Steve in Allentown” description shown here: https://forums.1911forum.com/showthread.php?t=829865 and as shown in the drawing. I also recently replaced the extractor in my Colt Govt 1911 9mm with an EGW and tuned it in the same manner as my 45’s. Works perfectly but now I’m curious, is the method shown for the 9mm extractor the way it is supposed to be done or is either way acceptable. If either way is acceptable for the 9mm, why is the 9mm method not also acceptable for the .45? Just curious, if you know, or if you have any ideas.