Aguila Blanca
Staff
The top deck is located relative to the slide stop pin hole center. That is THE reference point for the M1911 frame.45flaco said:So, a lot of the directions are based off the slide stop hole, but I recall most of the vertical dimensions being off of the top deck. Or at least thats what I measured them off of, lol. But yes, the trigger and hammer pins I think I measured from the slide stop hole for horizontal fistance.