After tracing and cutting out the two scale pieces with the band saw I clamped one side to the tang and drill the holes for the pins to 3/16" while it stays clamped.
Note that this is a tapered tang, so I set the back end of the tang on a piece of sheet metal then drilled the holes. This compensates for the taper. I then drilled some red spacer material.
Put some tape in the blade for grip and protection. Put your respirator on. This stuff can be nasty.