This is a new experience fo us because the construction of plywood boats has changed a great deal in the last decade.  The initial construction takes place with lightweight, fairly thin plywood.  The structural part of the boat is put in place with layers of fiberglass cloth.  This technique reduces the weight of the boat, and you can also add considerable curvature to the shape.  The stringers and frames are designed to help achieve structural objectives.  It sounds pretty complicated, and it is!  We have had plenty of experience building hard chine river boats with the "stitch and glue" method where temporary wire is used to hold the boat together until you use seam tape to hold the boat together permanently.  So we are learning a lot right now.  The templates that came with the plans are complicated, as are shown in the following pictures.  We transfer them to the plywood using transfer paper.