the post spec'd by the NA would resist about 160,000 in lbs bending moment, my carbon post 800,000 in - lbs sideways and 1,200,000 fore and aft. Meaning that the 30,000 lb boat could be suspended from the deep end of the rudder post without failure. The rudder with the spec'd stainless post was estimated at about 300 lbs, my all carbon rudder actual weight is 95 lbs. (if floats). If it cost more than the spec'd scheme, it was not more than a few hundred dollars.

I agree the bean counters are watching closely, but probably not watching the right things. Rudders and keels the buyer usually doesn't inspect, and doesn't question. Rudder posts are pretty easy to see in the boat yard. Keel bolts not so much. My keel was cast at Mars, when I was there I observed many "high quality" production yacht keels on the floor which were labeled by model. The attachments of many were in my mind clearly inadequate, Mars reluctantly agreed, but said, "we have to build them to the drawings supplied".