I'm assuming you know that you wouldn't be violating the rule if you booked JFK-SYD on QF 108 as a direct flight, but I'm guessing you don't want a 2-day layover in New York.

And you also probably know that routing JFK-LAX-SYD eats up an extra segment, not sure if you were pushing the 20 segment limit or 4/6 in N.A.
And lastly, how were you able to get A inventory on JFK-LAX?!?