I tied an extra footloop on the end of my tether, via a friction hitch. So I can 2TC in a pinch. I had my ROS come loose and slide down the tree a few years ago; I was able to rappel down 5' or so, re-set the OCB, and 2TC back to where I started. It's not my preferred climbing method, but it's nice to have the option. I've also used it as a footrest while lounging (totally not napping...) in my Drey.