drill the tang for hidden alignment pins (I would suggest 1/8 inch, it is easy to get 1/8 inch brass rod) set up your scales and drill for your rivets, but also drill 3/16ths into the scales through the alignment pins holes with the scale blanks clamped in place one at at time (make sure the alignment pin holes are shallow enough and placed so that they will not breach the surface when finished. With the scale blanks placed on the alignment pins, outline the tang onto the inside of the blank with a sharp marking knife, shape the profile of the scales off the knife right up to the scribed line. Shape the scales, get them ready for finish and radius the inside edge with a 1/32" radius, that will make subtle differences and scale seasonal dimensional changes less obvious. Personally I'd slightly radius the tang edges too, but I make my own damascus so I can etch whenever I want in the process, YMMV
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