So, I carry a bag most every day, usually a leather say he, with various papers and my laptop. This is fine when I'm in London and don't, as a rule have far to walk. I have, however, reached a point where it can get uncomfortable carrying my stuff over one shoulder every day when I'm doing my teaching abroad, where I have a daily walk of around two miles each way. Years ago I had a modern nylon back pack of the sort I'll put up with a level of discomfort to avoid having to carry again now, but now being able to distribute the weight evenly over both shoulders would be very welcome. I was looking to see if there's anything akin to the medium-sized Saddleback briefcases that can be used either as a shoulderbag or backpack depending on how you arrange the straps. Anything similar but affordable? Hunting the web it seems that on this front it's either stump up significant cash for something good, or pay buttons for, well, rubbish.