I just tested an idea to hang my ENO doublenest. It is similar to the ring or buckle ideas. I wrapped webbing around the trees, and brought it to the hammock. I took a loop of rope, looped it over the webbing, and back thru itself, and repeated that step 4-5 times. Then i had a prussic loop that could slide up and down the webbing and tighten when i yanked on it. Since the ENO's have biners right at the ends of the hammock, i simply binered into the prussic loop. When i layed in the hammock, it only got tighter, obviously. This can be done on both ends of the hammock. I am considering using another piece of rope to attach the hammock to the prussic knot, in order to eliminate the weight of the biner altogether.