Keith, you said, 'the three fastest growing classes IMO are the A-Cat, F-16, and F-18. All require measured sails and measured boats." However you omitted the Wave.
On measuring, I might add, is not that big of a deal. We only measure new sails.., not for every regatta. That would be a real pain.
So, the sail is measured and recorded, and the tack area is signed by the measurer. From then on that sail is just fine.

Incidently, one of the main reasons we opened up the sails and set up measurements was the stock Hobie sails were coming in with as much as 8" difference on the luff length.

And no one in our class knocks the Hobie sails.., they have won the nationals many times.

The beauty of having other sailmakers involved is allowing design ideas to come into the class that might improve performance. And soon, the price of the sails will start getting lower -- it is called capitalism.., free market competition. It works.

I'll never forget when a guy showed up for my seminar just before the Nationals with a new design sail by Randy Smyth. Awesome.., and funny -- it was a deck sweeper!
Probably would have been pretty fast, but the guy couldn't get from one side of the boat to the other. He had to take it to a local sail loft and have all the extra foot cut off.
We did make changes to the measurement rules to be sure it didn't happen again. But, you see the really cool thing was the innovative thought in it all.