Sounds like the PHRF guys (of which I are one) are trying to get something for nothing. If PHRF is indeed based on performance, the current rating for J30 is correct, and a 1/2 oz. helps the performance of the boat, it would be fair if there were a rating adjustment.
Having said that, i don't believe Lake Michigan PHRF looks at materials, just that the size of a sail is class legal. So there would not likely be a change to a J/30s rating on Lake Michigan.
