I saw on the wiki that the walk from T4 to TBIT is 10 minutes but just wondering if we should bother with the QF F lounge. We will be flying LAS-LAX arriving at 19:47 and then LAX-JFK departing at 21:30 so a 1hr47min transit. I am QF platinum travelling with my wife and 6 month old infant. How complicated is the terminal transfer and is there anything that might slow us down ie security checks etc? How much lounge time would we realistically have?