Thin notching is done with percussion and with a punch made out of the side of the antler base. Get one of the worn out whitetall boppers and split it lengthwiseStart grinding from the pourous center to the hard edge. It will look like a wedge when you are done, form the outside edge to a screwdriver blade shape. It works best for me if it is about 2 1/2 to three inches long, longer is hard to hold steady and shorter, I start to hit my fingers. Use a wood backing under your pad, if it flexes too much, it will break off the ears or just break. Legbone from a cow, elk. horse, or buffalo will also work. You will have to rework the tip pretty regularly. Bill