My old visqueen sails for the MiniCups finally fell apart so I have
bought some white polytarp material to make new ones. The old
directions said nothing about shaping the sails but the polytarp sail
manual discusses it. However, they also make reference to lateen sails
being self shaping. So, what to do, cut them with a curvature (what I
plan to do) or make straight cuts?
Next, how much does stitching lengthen the life of the sails?