I just want to get some opinions on Wilson Shok Buffs for 1911’s and are they needed with today’s metals. I know that some use these all the time, competitive shooters, guys who shoot high round counts. I know there supposed to help with peening where the slide hits the frame. I did use them on an old 1960’s era Colt Government Model that started to show this peening, the previous owner didn’t know he was supposed to change the recoil spring, when I got the gun, I replaced it, the older spring was about 5 coils shorter the the new one. So, I would like some opinions on using these, thanks in advance.