Qantas has gone to a per weight allowance on domestic (and NZ) flights
so you are allowed 30kg (66 lbs.) I am willing to pay for 5 KG each on
the CNS and AKL legs if needed. You won't really know until you are
ready to go but that would give you each 77 pounds of checked bags. Once
you know your weight I can go online and pay for it in advance.