http://tinypic.com/player.php?v=30rsf3k&s=6
Pic of it ...

pic of it disassembled...

That is the original one I made. Made from a copper tube/pipe from the radiator that was in an air conditioning unit, the spring from a mousetrap and the metal insert from a windshield wiper blade.
After quite a few uses I found that the copper tube was too thin and weak and the edges that the T-handle would catch on... would deform. Making it hard to "set" it.
I later fixed this by replacing it with a stronger metal tube made from the lowest section of an old golf club. And instead of two notches in the tube (for the T-handle to catch on) I made one. I needed to do this because the diameter of the tube was small. On larger versions (seen on youtube) two notches worked. This makes turning the T-handle a bit of a pain since I have to turn it so far. And... the tube itself is too smooth/slick which makes it harder to get a decent grip on while turning the T-handle. I need to put some kind of grip/traction tape on it.
Here are some pics of the final version ....

Note: it is important to note that the T-handle needs to have one arm higher than the other so that it doesnt catch on the notch as it makes a full turn once the plugspinner is tripped/activated