I also have to disagree with the above PHRF statement. If you are PHRF racing, the PHRF fleet sets the rules. Most fleets have defined penalties for deviations from maximum sail sizes. If you fly OD J30 sails you will be penalized. SOme, but not all PHRF fleets are nice enough to give OD boats a break if the total PHRF penalties are seen to be harsh. PHRF is not in the business of monitoring the OD class requirements of potentially dozens of diverse boats. When's tha last time the draft stripes were checked on a J30 in a PHRF fleet, what about equipment inventories? My PHRF fleet considers PHRF base the standard. Deviation is discouraged, but allowed with penalty. OD is tolerated witha slightly lesser penalty for the J30, but only 1 sec less than it would otherwise be.