OMG I just ITD OSS through YVR on Sunday and I completely did it wrong. I ended up landslide and had to reclear Security. I thought I was following all the signs including digital signs saying connecting passengers from my flight number. It was a LOT of schlepping and I did not see any signs saying OSS actually there. I saw no directions to any bus.

(I was also bemused by the new NEXUS machines that demanded I scan my passport and take my picture and then determined that my picture wasn't "good enough" (okay I was really tired after the first flight) so it X'd me and I had to show the docs to the agent.)

Barely made the gate in time to buy a sandwich at that Camden take-out because despite being J7 or more the day before, I stalled at 4th on the upgrade list by flight time.