I tie a slider made from Grizz's whipping knot which was on his hardware free suspension (he had an acronym for it, but I don't recall it right off). I don't remember the link right off. But it both prevents pulling the loop into the sling and also doubles as a way to tighten up the end of the loop so that it makes it hard to slip off the Marlin spike hitch or whatever you happen to be using for suspension. Make it from Lash-it or Zing-it.