Did some rasping on the neck the other day. The first picture shows the neck in my shaping jig. On this guitar a volute was apart of the design. This decorative addition adds strength. The second photo details this area. The side position markers, were made from maple. You can use plastic, mother-of-pearl, all kinds of material for this task. I had some maple scraps left over from the back of the acoustic, so I used it. A pencil sharper was used to give the piece of maple a point. The holes were drilled and the maple points glued in (photo). The result can be seen in the last picture.