Great news today from Dean and Paul at Norwalk Cove Marina - The new heat exchanger and manifold system is installed and sea trialed... and is working beautifully!
170 degrees at normal and 180 at full throttle (we never do that!!). Now to re-engineer the floorboard support that had to be cut away to accommodate the new (taller) parts.
The watch for a mid-Dec weather window begins!
Exciting!