I set up my ENO DN this weekend for a little car camping and decided to give a strap and ring suspension a try. I believe it's a sort of sliding ring system, like on a double ring belt. I used left over ratchet straps and a handful of rings from a ranch supply store. The straps went around the tree, two rings were attached to each end of my hammock. I fed the strap through both rings, then separated the rings and fed the strap between both back towards the tree. Tied a slippery half-hitch and thought it was good. I tugged and pulled to make sure everything was good, but when I got in the hammock, the foot end came loose and hit the ground each time. I ended up abandoning it and am now seeking council from everyone here as to what could have gone wrong. The strap just seemed slippery.