This thread
http://slinging.org/forum/YaBB.pl?num=1339632628 got my mind working again and I dug out an old idea and tried it. Apologies for the poor pics, I started in daylight but as it got dark the light wasnt so good.
I started with two lengths of paracord, six times longer than the folded length of the sling. I used a reverse twist for the fingerloop and the pouch sides and a four strand round braid for the cords.
Here is a closer look.
Then I started splicing a third cord, the same length as the other two, between the pouch sides. But I soon ran into a problem, the twist was not even between both sides and having them both twisted in the same direction didnt help.
Time for a rethink! I unbraided the release cord and redid one of the pouch sides. This time I twisted it the opposite direction and made sure it was matching the other cord as I went along. I didnt rebraid the whole release cord in case I needed to make more adjustments.
Here is a closer look.
I also kept the sides together and put the warp cord through both at a time. This was really easy, and is the main benefit of this method.
In closeup.
The warp is in place.
Pull the pouch sides out
Another closeup.
Use the longer end of the cord to start the weaving.
After a few passes its starting to look good.
This is a short weave for the centre of the pouch, these make it wider in the middle than at the ends.
The weaving is done, now I am working a little slack out of the warp cords.
This photo is out of focus, sorry. Here I am working one of the ends alongside one of the warp cords to finish it off. It was trimmed and melted after this. I did this to both ends.
Nearly finished now.
Finished! I used a Matthew Walker knot at the release end.
Isnt it a handsome thing?
It throws really well. At first I was hitting to the left but this was because the release knot is quite a bit larger than I am used to. Once I started really popping my release open I was slinging straight again.
The cords have a lot of bulk but the four strand braid makes them very flexible in all directions.
A possible upgrade would be to not twist the fingerloop but to use the two cords as warp for a woven fingerloop instead. This would be very comfortable.