My views are well documented and have not changed but I will not engage further in this discussion. Wildcat is committed to racing one design and thus we've made the decision to invest in a one design main, along with a trailer (so we can travel to one design events), etc. For PHRF we continue to use a laminated sail. And yes, it is an expensive commitment to have two sails.
Michael, sail cloth is not at all factored into PHRF ratings unless the sail material is a violation of class rules. Some areas give a "one-design" PHRF rating for the J-30. Non compliance to one design configuration is a 3 second penalty - but not directly related to sail material. To be specific, if the class approved a non-Dacron main, the boat would then be class compliant and still be able to sail with a class PHRF rating