I am about to get started on a SW17 from plans. I've got 3 sheets of 4x8 Okuome for the hull. To avoid major alignment problems I am considering scarfing all 3 sheets prior to tracing the lines and making cuts. (this way I will have true factory edges to line up prior to gluing) A 4x24 ft sheet of 4mm plywood sounds intimidating though. Any suggestions on a better method? Also, the plans talk about using a layer or 2 of fiberglass to renforce of other types of joints ...i.e. butt joints and the factory cut puzzle joints. But there is nothing about using this technique for scarf joints....any thoughts?