I'd like to replace my old, uncomfortable and heavy National Geographic rucksack with something a bit more appropriate for what I'm using it for - more serious walking or travelling, with a better back system, more space and more accessible. I also have a habit of using the bag as camera gear storage, so tend to end up carrying everything with me (and then not using it, but that's a different story - if I didn't take it, I'd need it...) I really like the look of the F-Stop bags, particularly the Tilopa or the Ajna. They're not cheap, but more importantly, they're not sold in the UK, so would have to be imported, with associated postage costs. I'm worried about buying a bag I can't easily swap / send back if it's not right, so want to know if anyone has used them and what they think? There are some specific questions.... Did you wish you'd bought something else? Have you had to get support or send it back? Are both of those bags acceptable as aircraft carry on? Are they accessible without taking them off? Are they worth the money, including import? Did you buy directly from F-Stop? What ICU do you use Vs the equipment you carry? Do you use any kind of camera strap system (Black Rapid or something similar?) with it? Would really appreciate your thoughts!