I recall reading that some of the slides in a kit come with a 9mm/38super pin hole size. I discussed firing pins with Bob at Fusion a week ago, in particular his .45 pin size being slightly smaller than others, and he said I could use any of the .45 pins. So I didn't think twice of it. He sent me an e-mail this morning that I should be using the 9mm pin in my slide as all his custom slides use 9mm/38super pins to better handle the pressure. This is good news. I don't have to send the slide back....and he e-mailed I should try another brand of grip safety and check the grip safety for warpage
. I'm going to confirm my measurements again before I order another grip safety.