I wanted to experiment with a few things. One is material: tarred nylon. A second is a ten strand square braid after joining the fingerloop. Third is dropping strands from a braid.
The material is fine. Found it on Amazon (
https://a.co/d/9s2MC9k ) The tar really stiffens up the nylon and adds a good deal of abrasion resistance since I'm using pliers to tighten the braid and when they slip, there's almost no damage.
The square braid down the retention cord is stiff (maybe due, in part, to the material). Seems to have some interesting flexibility properties, seeming to "prefer" flexing in certain directions and resists twisting. It's just this braid with ten strands. (
https://www.seekyee.com/Slings/howtos/8strand1.htm)
I started the release cord with a Matthew Walker knot and nine strands. I wanted a good sized stopper knot so the pouch has something to grab when I attach it. But I didn't want the whole release cord that thick, so once I reached an arbitrary length of nine strands braid, I wanted to drop some strands. Not something I've done before (dropped material from a strand to make it thinner, but never dropped a full strand). If you just leave the strands out and continue the braid, it'd be easy for them to get pulled up and out and the braid would unravel. I've seen people talk about "burying" strands, but figuring out the process took some messing around. Basically I ended up leaving a strand at the top of each side of the braid, then continuing with a seven strand braid, but wrapping up and around the dropped strands, so they became kind of a core on either side of the braid until I felt I'd gone long enough they were secure, then I just continued with the braid, leaving the two strands behind.
I've kinda liked this experiment. Making the cords individually has been interesting. I plan on finishing it up with some webbing for the pouch to make a seatbelt sling.