They took the Friendship 40 centerboard draft from 3'11" to 2'8" by redesigning;

"Fontaine obliged his requests by modifying the underbody, eliminating the stub of the keel on the 40, and increasing the ballast to provide sufficient stability. The shallow draft delta form hull will have twin rudders for greater steering control."

That's a little different, especially with the shallow under body and no stub keel. Headroom isn't much of an issue for how this boat will be used, but I'm interested in how it all works in reality.

http://www.rockportmarine.com/boat_details.php?boatID=51&category=4