One other 257 question: I've never seen a detailed image of the interior to see that these large accessory "pockets" are open on the bottom. It's hard to imagine that this happened by accident, so I have to assume this is as designed. These would be perfect to hold a mouse, external hdd etc. if they had a bottom. Being bottomless, it seems those items would just slide out and end up in a pile at the bottom of the bag. Is this consistent with how yours are designed? If so, how to do you use these?