Next was the marking out of the leather pouch. You want to use soft leather for this with a bit of stretch to it. I used scrap sofa leather and this was a bit on the hard side.

I didnt use the awl much in the end, I got a thimble and used that with the needle instead.

A fit check with the ends tacked in place. It was a little tight when I bent it, this is where soft flexible leather is superior to the stiffer leather I was using.

It was getting too tight by the time I got close to the end so I remove the tacking stitches from that end and finished sewing the side.

The Apache pouch is one of my favorites, a lot of work but definitely worth it

There are two differences between your sling and old Indian. The length and the end of the release cord.
That said, your tutorial is excellent and probably gives a very good sling.
And you ask an interesting question. Is an "Apache" sling the one of our Old Indian or a more general concept ?