Matt,

Sail design is currently done using specific CAD software packages. The outputs of this is then fed a CNC cutter/plotter which is used to cut the panels. As far as assembly you have to glue and sew the panels together, add the batten pockets, bolt rope and then add the compression fittings with a hydrolic press.

So, what I'm getting at is this isnt a matter of buying a book and a sewing machine. The sail design software is expensive - as much as $15k, cutter/plotters are very expensive machines - no clue on the $$, but I wouldnt be surprised if they were 6 figures, and the hydrolic press is also an industrial type press - 6 ton I think to press the rings on the sail - again this isnt something you do at home with a hammer in the basement.

You might want to find someone to design your sails, and someone to cut them and start with the sewing and assembly part.

Keep in mind you need a pretty big space to put together a main.

Bill