When I make constant cord wings I make up a set of templates from aluminum sheet or even just 1/8 light ply depending on how many ribs I need to cut. I just sandwich about 10 pieces of wood between the templates and gang cut and sand them to shape. Very easy to do. Just use spray mount glue to glue the paper templates to the wood for the formers, cut outside the lines and then just sand to the inside of the line. It takes me about two hours to cut and sand a kit. Takes me longer to cut the templates from the plans then remove them from the parts after cutting and sanding. I use my heat gun to warm up the glue to remove the templates.