Using the supplied PDF layout, mark out the pieces onto the wood as shown.
Start by cutting the strip with B, C, & D off. I used a jigsaw, but a table saw would have been much better for this step.
Cut out pieces A & B next.
To create a perfect curved end to B & C, clamp them to a working surface, and then drill out the circle using a 1" bit.
Do not drill the holes for the buttons yet!