OK..thanks everyone...It was hopefully a simpler formality then obviously it is..just another case in point of ignorance being teachable.
There seems to be a plethora of true symmetrical spinnikars out there used for sale..For learning purposes I thought running/ruining..
a couple 300 to 500 dollar sails would be prudent before having a custom made.
So Jeff... what do you think of the various calculations presented and knowing my boat what would you go with? Yes I would rather have an Asymmetrical but am not afraid of learning with the limitations of a cheap symmetrical. Or is this folly as well?
PS: jgeissinger..where did you find that information?