Packing Cube Backpack questions
As you can see from my forum-signature, I currently own some of Tom Bihn's finest. In the future, I wish to expand my holdings with some travel luggage, possibly an Aeronaut. In other discussions I've had on this forum, people have mentioned the Packing Cube Backpack (PCBP) as a means of providing both a large packing cube for in-flight/over-the-road carry-on packing, as well as a way of using the PCBP as a tourist's Every-Day Carry (EDC) backpack while visiting my destination.
I am curious about the Packing Cube Backpack. I watched a demo video on the 'net and want to learn more. I understand the pack's straps grip at the armpits, correct? How useful is this in a tourist's EDC situation? Can the lower external pocket on the PCBP hold common large pouches, like a Tom Bihn Snake Charmer or Side Effect or 3D Mesh Cube? I've heard of people using the O-rings in a Synapse 19 to suspend a pouch, such as a Side Effect, from the top of the main compartment's interior, but doesn't that require two O-rings? I understand the PCBP offers only one in its main compartment. (I first head of this practice in a demo video shown here.)
I'd like to hear from PCBP owners: how much organization can you incorporate into your PCBP? What color is your PCBP? How often do you use your PCBP for travel? What uses have you found for your PCBP while on a trip; what do you carry? How well does your PCBP work in your Aeronaut? How long have you had your PCBP?