Hey guys, thanks for all your complements! I really appreciate it, makes me feel warmly welcomed!
By the way, the measurements that I put on my post are in inches from the ring of the retention cord up to the pouch. With these two slings that I made, I used a scrap leather for the pouch, 2.5' by 6.5' with the pattern I saw here at the forum, 5mm accessory cord for retention and release, and 1mm accessory cord to tie things together, both used for moutaineering.
These are non stretch materials, as back when I was a child, I used to play slingshot when I was introduced with the sling. I tried using the rubber of my slingshot for my sling, and almost hit someone with a rock. haha! My actual first sling was of 3mm accessory cord, and one made with manila hemp, both got lost during my college days.
By the way Timpa, stretchable materials for retention and release are so
unpredictable, I can't suggest using them, though I myself am going to try bungee cord just for the heck of it. LOL
KUDOS!