This directory includes all of the plans that are specifically designed for stitch and glue construction. the rc model x-1 is an inexpensive way to try out this. What is lapstitch construction? clc’s exclusive lapstitch™ construction . patent no. 6,142,093 . the strength of the lapstitch™ joint is such that the designs. Free plans: absolutely free plans (links to free online boat plans) ariawood boat works (plywood punts, jonboats and one-sheet boats) architectura navalis mercatoria.