M.i.T. , Unfortunately, I haven't found time yet to make the falle-safe tension tools. They are really hard to get pictures of, as their distribution is so restricted.
If you are interested though, I did find one site w/ excellent pix of them:
http://www.crypto.com/photos/misc/picks/
(The tension tools are towards the bottom of the page, you can click on them to enlarge the photos.)
Good Luck.
-Mr. Glass