This A.M. I discovered that my 7mag Sendero's extractor is broke. It broke right before the lip that catches the casehead. The part with the rivet is still in the boltface. I looked on Brownell's website and think that I need the "extractor, rivet type, belted magnum, pg 412, p/n 767-157-090". Do any of the resident gunsmiths know for sure? If so, is it just a matter of using the correct size punch to "de-install" the broke one and install the new one and brad it? Help! Any advise/help would be appreciated. Johnny K.