Yes, I was surprised you opened it again. I had an alternative plan, but… However, it seems I was so surprised that I forgot that these are in range of the American fleet - I should have put at least one more destroyer or a battleship here.
Sink 1 carrier and damage a third one.
Re change of a buy - I would say that once attack is under way, it can affect the decision, so I would say it should not be changed? Not sure this is the case here, but looking at it generally. What do you think?