Folks, here's the itenm you've all been waiting for. My remarkable brother rigged his external frame with a 30 gallon hard plastic toxic waste barrel. That's 114 liters of backbreaking-but-not-bear-breaking storage. Keeps mice out too. Note the handy flat top - an easy place to add a duffle-bag full of cook kit, toilet paper, and climbing gear, with a cute li'l day pack to top her off. Other feature include crannies in the side for fuel and water bottles. 25 pounds unloaded. And the load is conveniently placed low and far from the spine for maximum stress and imbalance!