Think about the mechanics of rudder-mounted horizontal foils off the wind: Do you want to lift the sterns= keep the bows low (maybe promoting pitchpoling?). OR do you want to lift the bows= keep the sterns low (draggy & maybe avoiding pitchpoling)? But if your boat slowed down suddenly after speeding over a wave and sticking both bows into a large wave, the rudder foils will be rapidly lifted up and OUT of the water! I think there would be short-lived contribution to anti-pitchpole forces during this process. If there is still a 30k blast on your sail, the boat (A-cat) has pretty-much stopped and is going over frontwards anyway. I have seen this close up twice recently (sorry to finger Charlie Johnson for them, but he says the situation under which he left the boat was "Flicked like a booger".)