Crazy: Extractors last for a long, long time. You either have to shoot a lot, and I mean a lot, to eventually wear out or, more likely, break a extractor if you have a brittle one or a soft one that peens out. But, I've seen and used some old and very worn 1911s that still wore the original parts after 3 wars and that's a long time and a lot of use. Regardless, the fix is easy, and cheap - replace it. If you want someone's custom part you can spend more money than you need to for a 3 dollar part from a surplus house but often a bit of tuning like you did gets you where you need to be. A lot of custom parts are just mass produced and even stamped out stuff that are 'finished' the same way you would 'tune' it at home and that's where the high dollar sign for custom parts comes from. I've spent some goodly amounts of time trying to 'fit' custom parts to find that many require some attention to detail to get them to seat and smooth out. Mil-spec parts rarely require that attention to detail.
I would stock up on a number of parts - spring kits from Wolffe, mil-surp barrels, bushings, links and pins, couple of ejectors, extractors, firing pins, magazine releases, hammers and struts, slide stops; a goodly supply of parts like this is sufficient to keep the 1911s running for a long time - fairly inexpensive overall, too.
