I have built a DIY Hammock stand. (Will get pics when I am confident in the set-up). Basically it's 2- 2x4x8's standing at about 60deg angle. 2 ropes from the top of the 2x4's down to stakes. A ridge line between the 2x4s. I tied the rope (3/8") to the top of the 2x4 with two half hitches, no problems. The bottoms I looped through the eye in the stakes and tied onto itself using a taut line hitch. When I put weight on the hammock, one of the taut line hitches slipped. I retighted the hitch, along with the rest and it held. My question, is there a better knot for this, I need to be able to slide/adjust the tension on the rope, but not have it slip under load. Can I just tie a half hitch below the taut line, to lock it?