If you have to change the baby perahps among you may do this although another waits for that luggage or during the immigration queue. I have from time to time been through in 20 minutes and various periods ninety mins. Did you ebook a taxi or maybe a transfer company? https://sydney-domestic-airport-l96048.alltdesign.com/new-step-by-step-map-for-sydney-domestic-airport-limousine-50496945