We used to tune 1911s to run better and I had some curiousity to see if it could be done cheaply on a Glock I bought two lone wolf milled extractors and polished one. I tryed both with the pointy ejector block and the chisled one. The polished extractor with the pointy block gives the best result . FYI Lowering the port should give the same result as a 1911 and clean the whole pattern up. Im not chopping mine just to see.