Anyone have this, and if so what kind of a difference do you have with point of aim vs. point of impact? I've got the .357 Sig barrel, but contemplating the 9mm conversion as well. I've got 3 9mm's already, but the 3lb Apex trigger is so good in my FS40 that I'm on the fence about getting a 9mm conversion barrel for it as well. Just don't want to do that and find that it shoots 4" high or low or something.