Christine demerchant builds a 7 foot stitch and glue plywood tender for her tanzer 22. it’s an apple pie design. I recently purchases a 40′ sailboat and i now need a tender. years ago i built a 10′ stitch and glue tender/sailing dinghy with my dad. i think…. Crayfish stitch and glue plywood yacht tender. the facts and figures. weight 20kgs carrying capacity 3 adults . crayfish is a 8′ long pram bowed yacht tender,.