1,000,000? lol...this isn't going to be easy. SCHRS has an active rating for the phantom and while there may be some conversion tables I would, personally, consider running the event under SCHRS ratings and save some of the hassle. Because the boat's actual capabilities vary wildly in differing conditions, it's not a realistic goal to try and handicap them with other standard boats. That's not to mention the fact that you are probably looking at handicapping a distance race which adds further angle of sail inconsistencies into the handicap. However, it wouldn't demotivate me from trying to beat the sucker - so, good luck!