Rudder story: I thought about putting on the new rudder and submitted the new rudder profile along with the old rudder profile to the local PHRF board so they could see the difference between the 2. I was told that since the new rudder would be lighter & smaller with less drag & less displacement I would take a -3 second hit to my rating. When I said "What? The new rudder is the larger of the two!" they said "Sorry we misunderstood; because the new rudder is larger & will give you better control you will take a -3 second hit to your rating"
I have no doubt (and I mean none) that the larger rudder is definitely better for off wind and allows carrying the 1 & 2 upwind into heavier ranges than the sails themselves were designed for but since I'm already at 63/69/75 and in a fairly light wind area I can't see the benefit in going to the expense of a larger rudder for a 60/66/72 rating. If I were anywhere else I would.
Also, I think there are several different versions of the larger rudder - some are professionally designed by a NA and some are done by very knowledgeable "boat guys". Both mods get outstanding reviews.
What a boat. Happier every day.