Hi, I'm new!  Yeah, that's a hard one to figure out, right?  LOL!

I used to be into using the sling when I was a kid, and you guys have me baffled.  All these fancy designs, and they do essentially the same thing- huck a projectile a bit further than you can throw them. 

When I was a kid, I used a leather patch with a leather cord.  No sewing, just tie a tight knot.  I could lob a gold ball sized rock accurately about 120 meters.  I did a marvelous job of tossing golf balls from our back yard a few houses down and knocking out a window or two.  I would have gotten away with it if my grandpa didn't catch me!  Yeah, yeah.  Dumb things kids do.  Funny how we think it's dumb now, but boy we were the smartest people on Earth back then!

Last time I did much of anything was when I was 17 and used shoe laces and a cut up tater sack.  Wasn't the greatest, but it did well.  I found a good way to hunt ducks or pheasants is to take a hand full of 1" gravel and use it like a shotgun load.  Works good if you're within 10-20 meters.

     ColoradoCaveman, greetings!                                                   
         It is just human nature: someone is always trying to come up with a " better mousetrap." If dirt-simple works for you ( and, based on your bird hunting experience, it DOES  ) all well and good!    
         If you go to the historical gallery here on Slinging.org you will see the picture taken from the Bayeaux Tapestry of a slinger hunting birds almost one thousand years ago. Surprising how such a simple device has had such an IMPACT ( sorry about the pun  ) on history.
         Welcome to the forum and tell us more about your experiences!                                                             .......Dan          
                                                                                                     
         Uh.......come to think of it.......I managed to break a couple of windows when I was a kid.   
                                                                                                 ( But maybe I shouldn't talk about that.  )

try the zorrro sling with the tape pouch  works Great for me 

http://www.slinging.org/forum2/yabb/YaBB.cgi?board=1;action=display;num=11405229...

sorry forgot to put up the thread 

LOL np its a good sling most of mine are just 2 knots with tape over them and it works well

Welcome Colorado, yes the tape sling works great. It is the one I carry with me everywhere.