While waiting for the glue to dry, I made a rough sketch to determine F hole shape, placement, and control layout. The control layout has changed from my initial drawing, but the F holes will stay as pictured.
I drew the first F hole, decided I liked the shape and placement, then traced it onto a sheet of vellum
then I flipped the vellum over, lined up the edge with the drawing, inserted a sheet of carbon paper, and traced the lines
I used the same carbon paper method to transfer the shape to a sheet of oak, and carved a template
I can now line up the edges and ends on the top piece, pencil in guide lines, rough cut the shape with a scroll saw, and finish the carving by hand.