Fubar,
I haven't downloaded your marvelous handbook on the Guardian (yet) but I'm very interested in the aircraft since I took over hundreds of detailed close up pictures of the Guardian on display at the Nat'l Museum of Naval Aviation in Pensacola, Florida USA many years ago. This particular Guardian was a former fire bomber. So the cockpit interior was updated. Whereas I'm sure the overall basic interior remained the same there were some obvious changes. For example, main instrument panel is Cessna white.
By any chance do you have a list of various pilot's handbooks?