At least two boats that normally race PHRF in their local optimized configuration have previously attended J/30 NA's: J/Doe from CA/BVI (1999, 2006, 2007) and Hush Gully from Minneapolis (1996). Both used loaner boats and at least some borrowed sails to meet class rules.
About ten years ago Cool Change from Hampton, VA sailed the Screwpile Regatta in Solomons Island, MD once or twice in PHRF trim, though I don't recall what it was that made them different and the boat has never been measured. Within a couple years they switched to class sails and now have a One Design Rating (ODR), although for reasons I cannot explain the J/30 ODR in Hampton is 141 vs. 144 in Annapolis.
