looking for keel/centerboard design
Sure...There were two Soverels, a father and his son. The Son designed a series of very successful race boats and just died in the last few months.
The Father was a retired naval officer who went into boat builing business. He was a no nonsense kind of a guy who built a no nonsense kind of a boat. The Soverel 28 was his first production boat. Even for its day it was simple and spartan but very solidly built and very practical. There was a certain military like quality to these boats that scared off a lot of people but in many ways made a lot of sense. Soverel was an opinionated guy and many of the details (like the standard mint green deck color)reflected his idiosyncratic view of things.
Actually, I had forgotten about the Soverel 28 but it would be a near perfect boat for Troy.