Knowing how many times actual results conflict with a judges preconceived idea of how a test will work, and the rule books use of words such as arbitrary and hypothetical, I think there is latitude to change your mind on what you originally thought were the boundaries of the AOF. That said I think whatever boundary you decide on should be consistent for all dogs.
I guess the point of my OP was, should we judge a Flyer with it's attendant unfairness and widely varying AOFs differently then we would the much more consistent dead bird throws? I noted on the other thread what a mentor of mine told me a long time ago, he has run dogs since the seventies, judged a lot including at least one National, unless the dog is just flat lost on the flyer with a stupid out of the area hunt, he doesn't even draw the flyer line on his sheet. If we were judging in Canada, no flyers, it would be easier to stick to the rulebook that says the go bird's AOF should be considered to be smaller than memory birds.