Here are some updated photos and a performance report.
The boat handles very well at all speeds. The Tunnel Mite seems to thrive on choppy water, the stability of the hull is impressive. The turning is fairly flat. Top speed with a 25hp motor and a re-pitched prop is close to 40mph (probably a little faster with a lighter driver!), so far no tendency to flip over. This boat is a lot of fun. After I finish your Duckboar-Two I think the Tunnel King could be next.
John C. Smith