These info. are so helpful.
Further question: We will be arriving Narita at Terminal 3 at 8:55pm. We plan to get the NEX to Shinagawa. From what I read, the last trip is at 9:46pm from Terminal 2 and that the JR Service Centers close much earlier. Is there a machine from which we could buy our NEX (or even KEISEI) ticket after office hours? And can we possibly make it in time considering we have to take the shuttle bus from T3 to T2?

Much appreciated!