Some people recommend using two different types of locks to secure your bike-- for example, a u-lock and a chain. That way, a thief equipped with tools to break one or the other will still be unable to steal your bike. Is this a situation where a heavy duty chain like the New York Fahgettaboudit, in tandem with the New York u-lock, would have prevented the theft? Or would the sawzall have cut through both with equal ease?