Ok so in summary:
SYD Airport QF/EK/OW
T3 to T1 Airside transfer AKA “Seamless Transfer” from Gate 15 and ***Immigration/Customs at gate15***. Bags checked through via initial DOM checkin
T1 to T3 landslide transfer AKA “Seamless lite transfer” from landslide outside T1
Pickup bags/immigration at T1. Transfer bags at transfer desk - bags will check through to final domestic destination. Go outside and take the Tbus to T3. Then at T3 go through security as per usual.
Am I correct?
T3 to T1. you will still have to do outgoing immi and customs and int security screening at T1. they will never do that at gate 15 at gate 15 in T3. no space, and no staffing.
Bag check through from your latest departure airport, to the int plane at SYD T1, we hope will continue, but who knows what will happen in future.
For now, yes, you don't see your plane hold bags in SYD.
If you look at gate 15 now, there is no space to add walk through int security screening, or even add smartgate, unless they do major reno, and extend gate 15 onto the tarmac.
The ideal is to have them move the bus asap on a time scale, and not try to wait and fill the bus, which they usually do.
For T1 to T3, and with no more transfer desk, by the looks of it.
Collect your bags from carousel, go though incoming procedures, most likely they won't look, or if they look at your bags, guess it luck of the pick.
Then with your trolley, take it to the bus stop, put bags onto bus, leave trolley and make a run with tom/dick/harry/mary/shae/sharla/margot/robbo to T3 dom check in with the masses.
Don't know when the QF T1 int to T3 dom zone desks/xray, etc, will be unmanned permanently, items removed, and the space taken over by shops/offices.
Edit, this is from the QF website, see, even now, it already says the transfer bus will drop you at T3 departures level, not gate 15 anymore.
(((For international arrivals, a Seamless Lite service is available for customers arriving on international flights and connecting to a Qantas domestic flight. Transfers to the departures level of the domestic terminal (T3) depart every 15 minutes in the morning and every 30 minutes in the afternoon and evening from bus bay 10, with a travel time of approximately 20 mins.)))