Hi Guys,
Recently I flew out of T1 @ Syd and went through immigration and security via the
T1 Departure Gates 8 to 37 -
B pier. It was like a zoo (1500 passengers passing through that hour, I was told) and took me nearly an hour to get through

...so no time to get to the QP

. It got me thinking...can I go through immigration and security via
T1 Departure Gates 50 to 63 -
C pier, assuming it is quieter, and then walk over to
B pier as the maps above seem to indicate without any security questions / concerns by the airport staff?
Thanks for your input!