1911 slide thickness

[shayski]

Hey everyone, I just got a sig 1911 with rail. iv been having a hard time finding a holster for it. my understanding is the sig is a little thicker in the slide. Using a micrometer at its widest point is .922". My question is can anyone tell me what the widest point of a sa, kimber, colt, ect is. My plan is to simply file down the inside of a holster that will accept any of the above mentioned 1911's. I just need to know how much to file away. Thanks