I am considered starting a new thread discussing pros & cons of and alternatives to the top 3 quick release tree hugger attachment devices: Carabiner, Dutch clip, Soft Shackle. There are a lot of alternatives, some very ill advised and ad hoc. But my concern is that there may already be multiple threads and I just did not find them in a search. A thread back in 2007 with Dutch and others designing improvements to figure 9s was interesting. I was looking for something more recent.