The interesting thing is, with a base PHRF rating of 144 minus 3 sec for the 163 and another 3 for the penalty pole, a Lake Michigan 30 could race PHRF w/ non class sails and still rate 138 (I think I understand that there is no penalty for sail cloth other then making a boat start at the base PHRF rating, instead of a pre ordained OD rating). Ugh... I'm just confused.