Erice,
One sure way to pitchpole or capsize any multihull is to cleat a big off wind sail. Even using a continuous sheet on a sail like that is risky.
was out the other day and trying to use the gennaker as a super genoa?, as the swiss do on those light air lakes. very nice in light air to get the jib nicely shaped to to the main and then pull the big gennaker around the whole lot and bring it as far back and close to the rear of the boat as possible
even found a convenient cleat on the hull back there to hold it!
