Honestly, I’ve given up and use an internal shell-thing inside (like this; currently unavailable: http://amzn.to/29p1eBd) inside either my daily-carry messenger from Tom Binh or my hiking backpack. It lets me be flexible with the actual carry/tote, stuff it in a plastic bag for increased waterproofing, and further…

Honestly, I’ve given up and use an internal shell-thing inside (like this; currently unavailable: http://amzn.to/29p1…