Sorry to bruise the ego, Maui... maybe the big green and white aircraft you saw was Eva Air. Unless it was a one off, i have never seen a scheduled CX 777 fly to Aus! I have been travelling back to Aus for well over 20 Years, and unfortunately for the past 15 years have been stuck on the Bus. It would be great to have the tripler as an option... i would get home quicker and have more seats to choose from!
Then again, you have been flying it for 10 years.... you MUST know more!