Hello All,

..yes, I agree with you all,...it is not rocket science...

...the Texel site even has a spredsheet(Excel) download with the formula in place,..you just put in the numbers,...and let a calculator do the rest

...in this case,,, just change the mainsail size to that os a I-20 North American stock sail ( from the factory),......

...that is why the formula( based on on finite measurements) rating systems are nice,....a 327c.i. 300hp chevy engine is the same every year,....not 350 hp one year,...and then 295hp the next year,....a crude analogy, but the point is clear

..keep is simple,...lets go sailing..

...once again,..thanks to all.

regards,

Bruce
St. Croix