So I've been reading a lot about this fire pin modification The M1911 Pistols Organization Forums Site - Amazing reduction in perceived recoil with a simple part change - EGW firing pin stop
and how it will help with tracking and side to side movement along with reducing muzzle flip.
I ordered a EGW 70 series SS oversized fire pin stop to see for myself and have to say that it was well worth it.
I got mine yesterday and installed it in my SA Trophy Match. I just got back from the range. I was amazed at the difference on accuracy and muzzle flip.
The install was easy you just have to take it "SLOW". I used my old fire pin stop as a guide. This was my first time doing this.
Thought I would share this info for people that have never heard of this modification.