Extractor on 1911`s

[WSM MAGNUM]

How do you tune extractors on 1911`s? I have a Kimber Stainless TLE II in
.45 ACP, and the brass gets a pretty heavy ding in the middle of the case. See this thread.

http://thehighroad.org/showthread.php?t=291468

 

[Old Fuff]

To start with, is this a Kimber with an external or internal extractor?

 

[WSM MAGNUM]

Internal extractor.