I bought a Cylinder & Slide spring steel extractor, and note that the instructions say no modifications are necessary, just proper tension, and that any mods will void the warranty. C&S installed one of their extractors in another of my guns, and it looks like they did a little bit of work on the "ramp". The unaltered extractor looks very much like a Colt, with a distinct bevel in the cam area. The C&S-installed one has had this bevel blended into a rounded contour, as is suggested by most. C&S is adamant that the extractor needs no modification. Install it and see if it works? Go ahead and do the blending?