Came across this bike lift from J&S Jacks, not sure if you can get it in Oz but they ship internationally: http://www.jsjacks.com
I reckon the lifts with a foot controlled, sprung loaded lowering pedal might be better than a manual turn valve type.
Gives you more control while lowering, and the ability to stand next to the bike for steadying at the last stages.
I got one of those repco lifts and the bike has been sitting at full height now for over 3 weeks. It came with a tie down
but haven't used it. Rock solid.