If we are to maintain an open class, then I would vote for a sail size of 17SqM period. I love experimenting with sail shapes and the within the 17SqM rule, we can all find that sail shape that each of us prefers. That will enable us to refine the gennaker/spinnaker shapes to those that work best with each type of boat considering that each type may vary in mast length, composition, cross section, etc.
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<br>Jon Hamlet
<br>Taipn 4.9 #217<br><br>