Idea 21 is the latest project of small plywood & epoxy sailboats plans for homebuilders. chined hull for the highest stability, for racing or cruising.. Instant access to 518 different plans – from small wooden boat plans to large sailboat plans – free boat plans. The plywood for boatbuilding faq version 1.1 11/9/96. edited by craig o’donnell send corrections and additions to me. about the faq. this is a basic introduction to.