Ultra
good luck getting all thses calls in with 4 aircraft in the circuit, and at least 2 or 3 inbound or outbound at any one time.
So what....don't even bother??
Like I said if the radio's busy, no-one's going to bite you for omitting a call.
You don't get to pick and choose the rules.
Moorabbin is a good example of being aware of where other aicraft are around you.
Come try flying at Caloundra one day. Caboolture and Redcliffe all on the same CTAF. Not really much drama. If radio's busy for one of the turns, you've still got two other chances and I can guarantee you have a better awareness of where the other aircraft are in your circuit as a result.
Before someone chimes in with "but what if congestion.... but what about overtransmitting???".......
Being a hell of a lot closer to you, and aircraft in your circuit will come across stronger and more audible than an aircraft at the other end of the CTAF area