So, after practicing a fair bit on this method at home, and thinking I had it down, I had quite a bit of trouble out in the field on the first night of a 3 night trip. I had made a webbing strip, but like in my post above, I was worried about it slipping so I did the 2 string method.
The problem I was having....was tangling. Mainly with my thinner "leading line" ....it would tangle with itself or ...it would get twisted with the other lines. And, it was hard in dying light to keep track of all the lines. At any given point there are like...4-5 lines going up to the branch that you have to manage.
I eventually ended up getting 12' or so of leading line and a carabiner stuck up in the branch...due to a big tangle of my leading line. I think if I used zpacks 1.2mm slick line for my leading it wouldn't have happened, but, I assume I still would have gotten lines twisting together. That night I eventually just did the same as my hiking partner. He just threw a single line, tied it to his food sack, lifted the sack high above his head, and then walked the pull line out and away from the branch at an angle to hoist the rest of the couple of feet, and tied to a tree. We weren't in sensitive bear protection areas so I wasn't too worried about it. The simplicity and ease of it...was..hard to beat.
But I am willing to try again. A few questions:
1. Are you just using standard smooth silicone fish tubing? Did you cut it or...just tie your guyline to it? Could you upload a pic?
2. On my setup, I was just using 2 standard carabiners...like the zpacks mini carabiners ->
http://zpacks.com/accessories/carabiner.shtml
Now, both carabiners are completely rounded (they are tubes), so I assumed that they would have similar friction compared to the 7mm antal rings. How wrong am I on that?
3. @cmoulder Where did you get your two rings? I'm trying to find the cheapest way of getting 2 to try out....most places after shipping they are coming to $32-$35.
I may just go back to a webbing form instead of using 2 ropes. If I do the non PCT method and just tie the haul loop to a different tree, then I wouldn't have to worry about the webbing slipping when retrieving the food bag...would require a bit longer rope though.
I did learn...that I do like using a rock bag instead of wrapping/tying a rope to a rock. I had a zpacks rock bag that I have never used...and, I'm glad I haven't yet. I made a Tyvek bag and ...it would basically get a tear in it with each throw when it hit the ground. I would hate to do that to anything cuben. Tyvek is super easy to make stuff sacks out of. Here I even sewed a drawstring channel, though next time I would just "tape" one together. And, when it tears due to the bag hitting the ground, just put another piece of Tyvek tape on it.