I was really pleased with my first "F" but I am just as happy with the replacement. Tomorrow I'm going to try to get out to our shooting spot and put a couple of hundred rounds thru it. I have not modified the slide lock, or widened the rear sight notch on this one yet, but I seem to feel more comfortable with it after 1800+ rds. [2750 on the original WW] I'm going to try some F.A.S.T. drills on the clock and see how I do.