The finishing of the tail block completed, next came situating the hitch pins in the "blank" new block. The next few images show the method I always use to do it. First, the distance between the two outermost strings/pins was measured. As the instrument has 20 strings, this measurement needed to be divided by 19, for the 19 spaces 20 strings make. No number on Earth divides evenly by 19 of course, but that's all right. Big tip: this is a LOT easier to do in metric...which would you rather divide by 19, whole numbers or fractions?