I saw a mate using these a few weeks back and thought they looked like just the thing I have been looking for. I was using a single shoulder strap and was getting sick of the chair leg digging me in the leg all the time and catching in the undergrowth. They are easy to fit to most chairs and you end up with the chair legs pointing up so you can hook a rucksack over the legs ala the korum roaming kit. I didn't walk particularly far but did notice how much more comfortable the new strap made carrying my chair. See the link below.