I recently got my 1911 classic custom back from Kimber. I called them about a month ago and told them about the constant jamming problems I was having with my pistol; failure to eject, failure to feed, different mags = different jams, slide binding on the frame, not reliable. They reworked the extractor, replaced the recoil spring, replaced the safety, mags now fit tighter; not loose like before, and replaced the night sights with a upgrade. I shot the pistol yesterday and it performed great. 12 mags and no problems. Best of all the accuracy improved even more than when it was new. I give Kimber Service an A+.