Volume - Your knowledgeable remarks about the rudder actuators are tantalizing. I am having difficulty visualizing how the three actuators work independently & together at the same time. A sketch or pix would be sooo helpful.
One guesses that the actuators are push-me pull-you variety, each with authority to command some arc of movement. How do they keep out of each others' way? What mechanism negotiates the battle if each of the three wants to move in a different way, and what does THAT lever against? And how does IT fail?
This is probably a dumb question - my coffee to sleep ratio is runnng way too high right now. Your specific knowledge of rudder details seems like a beacon in the fog that surrounds this.