The puzzle joints used by CLC in their newer stitch and glue kits make panel alignment easy, but they are nearly impossible to make unless you are using computer controlled cutters. When we build from plans we are instructed to scarf the plywood sheets together. While scarfing makes a very strong joint, it's a lot of work and requires skill with planes and sanders. Could we just use butt joints? I built a Bolger Cartopper from 6mm okuome once, butting the panels together with thickened epoxy, reinforced on both sides with 4" wide strips of fiberglass cloth cut on the bias, with the glass strands diagonal to the joint, and never had a problem with the joints. It appears from the Pygmy website that their kits are assembled this way. Do we really need the extra strength (and work) of scarfed joints when we build kayaks from plans?