Singapore Airlines said the other day that Airbus has to redesign its Airbus A350 if it wants to really compete with Boeing's 787.Bloomberg reports that it took Airbus four attempts to come up with today's A350. And the most interesting fact is, the A350 is pretty much a revised A330. Just use more composites, new parts, and a new tail, and you have a totally different aircraft, right?Wrong, says pretty much all of the industry executives. Singapore...