The original idea was to build an open canoe and use it for sailing and paddling. However, we had second thoughts about using a homebuilt wooden boat on moving water. Not wanting to see all our hard work broken into small pieces, we had a change of plan and bought a "plastic" boat. This was then adapted for sailing by making a leeboard, rudder and fitting an old windsurfer mast with a commercially made sail.
A spare piece of plywood was used to practice before actually working on the real pieces. Although not perfect both the rudder and leeboard do now have a simple profile.