Built a jig an(essentially a long tang with no blade) waxed the tang to ease installation and removal and glued and clamped the disks together with crazy glue. I then sanded it down on a 1" table top belt sander (Harbor Freight) with increasingly fine grit taking frequent measurements to ensure profile matched that of an original sample . Final sanding with jig held in a vice using 1" sandpaper alternating sides. Relief cuts using a chainsaw file. The groves are the weak spot must be a better way to increase precision. The ability to take the glued handle of and onto the jig is very helpful. Died the leather with alcohol based leather stain. The dye might have worked better if I had soaked in stain before I glued them? Finished off with a coat of beeswax and buffing with a strip of towel in the same manor as the final sanding. I hope this proves helpful to others.