I have a Model 63 which I bought new in the mid 1990's. It recently started having issues which I determined were cause by a lengthwise split in the milled flat of the extractor barrel. I looked for tutorials on fitting a new extractor; youtube, Kuhnhausen, gun forums with no luck. With an assortment of small files, stones and an optical visor I proceeded anyway ... slowly filing, stoning, testing each lug in sequence until the job was done to my satisfaction. I embarrassed to say it probably took me 20 hours to complete this project. My question is what tools would a gunsmith/the factory use ie; jigs, custom files, etc. for an extractor replacement. I would guess a knowledgeable smith could the same job in about an hour. Thanks.