Do you have somes flat pouches templates i just cant seem to be good with cupped pouch

It's funny because I haven't had any problems with flat pouches or split. My flat pouch is a pretty large former slingshot pouch and it's worked great.

I just made two pouches. The red one looks very promising to me.

Just tried the 6 holer with duct tape covered paper template. Seems to work really well, should be even better when my leather finally arrives... Duct tape layers seem to be quite rigid and not like changing shape too much- I feel like I might break the pouch if I accidentally sit on it.

I've been making a few leather pouch slings recently.

Funnily enough I find pouches with 'flat' connections to the cords to not be stable enough, at least with my leather. They tend to flex and drop stones out the side (by flat I mean that the cords connect to horizontal layers of leather).

One design that I found reliable above all else was the seatbelt sling design (which you can make with leather too). This has a very stable (not horizontal, vertical) connection to the cords.

The way I make them now is to create the classic seatbelt style 'M' fold, but instead of threading a cord through the middle and whipping round. I punch holes through all 4 layers, insert eylets (at least on the outside holes) then attach cords/braid through the holes.

This seems to have the same stability of the seatbelt sling but allows you take it apart or swap cords if needed. I appreciate this since I've had one seatbelt sling fail on me (knot pulled out of the pouch) and one where the whipping started to unwrap (but I then lost).

The sling can be made easily from a rectangle of leather 6cm x 14cm (if you like, you can thin the middle, It gives a slightly more streamlined shape). The eyelets probably aren't necessary if you have strong leather, it looks nice though, and this design probably puts more stress on the holes than other designs.

I'll get up a picture at some point of it and the template.

Like that design JudoP.  Good work 

That sling looks really sleek. I might make one myself.