Description, photographs and drawings of plywood stitch and glue sailing dinghies and yacht tenders. 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,. 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….