Sounds good ... I have only hand tools, so it is going to take some time to drill, cut and file that washer.  My copy of Jurek's design was much faster, all I had to do was cut a length of 9-guage wire, file the ends smooth, and wrap some cord around it and the pouch.
 
Thank you for confirming my guesses, TechStuf!

If you can feel such a difference then your reflexes must be honed indeed!  Honestly, how do fellow martial artists react to your sling demonstrations?  I would think that such an art would really take off over there!
 
 
TS

After a couple thousands of shots I do start to feel the subtler differences, especially with short heavy slings.  I think that is the key to getting better at anything, just keep going way past the point of bordom.
 
The dojo that I went to really didn't have the space for slinging.  And I didn't stay long enough to make friends who'd go to the suburb to witness my obession.  Most of my tennis friends shows interest though.  I just went slinging on Monday with a bunch of them.  Most of them do well with the fgure 8.

Tint,
When you use a narrow grip, do you put the finger loop on your pinky finger, and run the cord across your palm?  If so, then you are getting a little support from friction between the cord and your hand.  When you use a wide grip, one finger is supporting the whole load.
 
I found that making the finger loop thicker distributes the load over a wider area, and it relieves pain.  That is the idea behind wrapping the finger loop, as Funslinger and Jurek showed us.
 
Another way to do this is to make a double loop on the fingerloop.  I have done with using a bowline knot, as Jurek shows (see the last photo in that post) and a perfection knot (sorry, no picture available).

great discusion guys
I am a big fan of the wide grip release. I can feel when my relase is not consistant. often its the ammo spinning off the back of the pouch.  I seem to get a better constant accuracy with the wide grip than the narrow grip. i find the wrist loop wrist loop aid in a more costant release.

Sorry about taking so long to reply to this post. been up on pct. Any way i thread it though my middle finger and pinky finger then the release string in the normal spot between middle and thumb. One of the reasons I like the wist loop so much is its easy to change things. Heck if you want to shorten the sling just wrap around the wrist a time or two

Hey, TechStuf!
 
I just built a sling using your wire release hook.  I was cheap, I just used 12-gauge bailing wire.  Here's my first impressions:
 
This is not a sling for general use, it takes too long to load it.
 
It is rather heavy.  Noticeable pull on fingers after release, which is something to get used to.
 
I'm consistently releasing LATE!  I think I need to work at the release gadget with some pliers.  I believe the angle and curve of the wire is critical to a good release, and I've got them wrong.  Then I need to polish the wire, I can feel the release ring catching on the wire.
 
FOLLOWUP: the shape of the hook is not as important as its smoothness.  I finally gave up and made another hook, and I was careful not to mar the surface of the wire.  Even though it is not as well shaped as this one in the picture, it releases much, much better.
 
If you want, I'll scan the sling and post the photo.

Dale,  I wouldn't mind seeing a photo.....as mine seems to have no problems.  Sure, it's weight is noticeable but negligible....and the load time is a bit higher but after a few casts, one can learn to latch very quickly.
 
 
When I get the new hooks, it will be ready for prime time.  The new hooks will not allow for accidental dumping and ammo can be easily loaded with one hand.
 
 
I'm getting there.....after my vacation, I'll get the web site finished and get things moving.
 
 
8)
 
 
TS