Not too many llama people here, but for the record...
I don't need a tight highline. I use a line lying on the ground and it doesn't need to be very tight because llamas won't fight it. I put some o-rings in it for lead ties. If the llamas get tangled, they'll just stand still and get themselves untangled. I need rope that's very visible so I don't trip over it. Plus, it needs to be very water resistant since it lies on the ground.
You can spend $10 for those fancy tie rings that can be put anywhere in a line, but a 3" o-ring costs under $1 and works just as well. Welding a big nail or steel rod across it helps keep it in place a little better but it's not necessary.
