How about racing all boats in one fleet and when it's over do a Portsmouth calculation as an Open race. If the replacement sails are the same area (within 5%) I think the 0.995 MN modification would apply. The new and improved boats would need to give the stock boats 18 seconds per hour handicap. If the new sails didn't offer that much improvement they weren't worth arguing about.

However, the arguement could be made that only aggressive (better?) sailors would upgrade and so faster sailors would sail faster boats, thus compounding the problem. If you include the rudders, take another 18 seconds. I bet the original race results would not change much.

When you think about it, it's just a boat! You folks are starting to sound like Little League dads. You could just step behind the dugout and settle it with your fists.