If you're building your boards to be run aground at full speed, they're over built. That's not their purpose.
Yes Mr. A cat that is 100% true, but you own an F18 now so you can distance race again and my money says you're gonna find the bottom on occasion. You'll be very happy to exercise your carbon skills to get back on the water rather than writing momma a check for $1200 (assuming you only trash one). So I say, I sail a heavy boat by class rules, over build it please!
Welcome to the party? Have you developed the skill to do a double trap spin reach in chop in a short boat yet? It would make me sad to say "Todd was behind us when we came out of Angle Fish then we never saw him again". Okay, it wouldn't make me sad but it would distract me from my rummy.