Remember also that, regardless of what you're told, you are not applying for a job with qantaslink. You're applying for a job with EAA or SSA. If you want to be in MEL, then take a base in SYD or MQL. If you want to be in Queensland, take a base in BNE, CNS or ADL.
The always charming recruitment woman will lie to you about how base transfers work. At the end of the day, you need to make very sure that you end up on the EBA that you want to be on, otherwise they will screw you