Ken, I finally located my 7 1/4 pound 10 gauge G Grade Lefever that I was so curious about pertaining to pin separation. The gun has 1 5/32 pin separation. I don't remember what the final choice of pin separation was on the new gun, but I remember that it was not fractional. The 1 5/32" separation is just a 32nd more than a #1 1/2 frame Parker and I don't recall its relationship to most XX frame Lefevers. I will try to locate the "frame size" thread and compare this frame to others we researched. This is no ugly gun and could be made in 20 gauge very easily if the breech balls were trimmed just a bit. As I mentioned before, Parker tens were made on pin separation as little as 1 1/16". That is 1.0625, a bit smaller separation, as I recall, than your final choice for the new gun. Bill Murphy