I don't have a dog in this fight, (as the red-neck's down here like to say), but I'm glad there are people like Wooter, Phill and Matt, who will do the necessary work to get this class going.
I expect someday I will have one of Matt's Blades to race, here in the states. I expect I will only be racing against other Matt's Blades (MB's) and the Tai Pans, (we call them F'n Snakes) and will never see a Stealth or any other F16 around here.
As long as we all are pretty close to the same sail area, I'm happy. I have never seen anyone measure sails at a cat regatta but at all national dinghy championships, you must show up a day early and they do measure them.
A problem arises when you get a sail maker who also races and wants to push all the measurements, but to be fair, they should of course make the sails to the maximum size, so there needs to be a consistant measurement method to keep it fair.
But, do you intend to measure sails at every regatta? I doubt it. It doesn't take that long if you lay a pattern on the ground and lay the others over it, but you know someone always shows up late, with little time to rig, and bing-bang-boom they are out on the water.
I don't think an inch or two here or there matters in the big scheme of things, as one blown tack will offset any few inches of extra sail area.
But, if some guy wants to add 6" to the leach and a foot to the spinnaker luff, we may have a problem.