We are very big on making jigs to replicate parts with precision. By making our jigs as precise as possible, all parts made from those jigs will have the same precision. We made four jigs to make the nose ribs. Rectangular plywood pieces were first rough cut with a scroll saw. Then the interior lightening hole was trimmed flush with a laminate trimmer. Next the outside was rough cut with the scroll saw and then dropped into the two jigs mounted to the plywood for the final outside trimming.