I have been using the synapse for work for around a week and absolutely love it. I particularly love how well the synapse uses its space. That being said, how do you experienced Synapse 25 owners utilize the upper part of the main compartment? What I'm talking about is the space between where the top of a binder, when in the bag, to the zipper? There is a good 8 inches there that I want to utilize, but not sure how.