I the same relationship with my gunsmith, Otto Matyska (Ottocomp). When I got my first open gun in 1987 he showed me how to take it apart, clean it and adjust the extractor. He told me that he knew I wasn't very mechanically inclined so if I broke something bring it in and it would be easier for him to fix it then instead of fixing what I screwed up. The hi-cap he built for me in 1993 is the gun I currently shoot. I replace the springs but the only things that have broken on the gun over the years have been a sear and the thumb safety and Otto replaced those promptly. At appx. 65k rounds I am on my second extractor.
Yup I know my limitations.
Marty
A-7424