Got the Aftec extractor installed on my 1911A1. Followed the instructions, taking all appropriate measurements, didn't have to do a thing except install it. No filing, sanding, nothing. Works fantastic. One thing though, the brass kind of just rolls out and drops about three feet at 2:00. A few times it felt like it rolled down the back of my right hand. Very light loads, 3.7 grains of Titegroup under a 200 grain LSWC. Might drop down from a 15 pound spring to a 14 pound just to kick it out a bit farther. Other than that, I'm very happy.