I replaced the extractor on my stainless Commander and the FP stop plate was so tight that it would not slide in. With the factory extractor the stop would slide in and out with finger pressure. The slot on the new Wilson Bulletproof extractor was such a tight fit the FP stop would not go back in place. I used a jewelers file and opened up the slot in the extractor just a hair to give clearance. Still had to lightly tap the fp stop in place but it is no where near as loose a fit as with the factory extractor. Should the FP stop removal be a tool less procedure ? There definitely will be no extractor "clocking" as it is now but the extractor or firing pin is not "field replaceable" as it was.