I'm planning to take my new Synapse as a carry-on for an overseas trip this summer, and I'd like a smaller bag to fit inside the Synapse that would fit a change of clothes (light skirt, t-shirt - not bulky clothing). Based on the measurements of the Synapse(see this thread), it seems like the only packing cube that would fit, and not take up practically all available space in the main compartment, is the Packing Cube Shoulder Bag. Has anyone use this packing cube in the Synapse? Or does anyone have a better thought for separating a change of clothes? Thanks!