I've been reading about .019 and .029 pin size. I know that the fiber size is different but I'm wondering about the actual pin. Is there a different size in the pins themself? What I'm getting at is I'm looking at a spot hogg seven deadly pins and is the arm of the pin for .019 the same as the .029? My pins are close together already with a tru glo extreme and trying to find something with a small pin diameter.