Some here might be aware, but I have an interest in swords as well as slings.  Currently I have a katana that I'd like to replace the tsuba on.  The tsuba is the hand guard.  I'm not in any real hurry so I've just been intermittently searching around on the Internet.  Yesterday I came across this one.

I've seen tsuba with images of rope on them, but never anything like a sling.  I will mention that I'm pretty sure the image on the tsuba isn't a sling.  The little gadget on the left side looks like it might be a weaving or something (although maybe they're weaving a pouch! ).  Whatever it is, it instantly reminded me of a sling and I figured I would post it.

Yep, I hear you man.  Not sure if that's a leaf, or a pattern, or something else.  Then the thing on the left might be a locking mechanism or a hinge.  No idea.

Although it does make me thing of a sling design.  What if the pouch had a 2 point connection on the release side.  But one point would release when the sling is released.  Sort of like a cross between a regular pouch and a Y pouch.  Not sure how to rig that up, but I'm thinking about.