Nice work Jerry! My only thought is that Constellation style rudder is more vulnerable than the original design. During a low tide grounding that rudder will make a pivot point on the bottom and induce all sorts of stresses. The original design was rounded off to prevent rudder damage when a sailboat is rocking it's keel in the mud, common in my parts. I find it hard to believe adding that small addition to the bottom of the rudder helps the boat sail better. Weather helm is controlled by sail trim.

Ben