I have also traveled from oz many times in the past and find it really stupid for someone traveling id90 on the day before a duty so that they may have to comprimise thir position on cc!
And in todays environment even stupider!
Come home with a day to spare, there is less stress about the what if's and there are more options available to you. Including through SIN.
There are lots of flights out of oz and no excuse to be working one on a day off, thats all.