Talljeeper, Those do fish well but for the cost of two of them you could make 30 solid lead weights and not really care if you lose them.

The downfall I have with slinky's are they are not easily adaptable on the river. Burning and cutting, smashing, punching holes. You would have to have a whole handful in your pockets of different weights not knowing what the river would look like that day.

I personally use the solid lead and surgical tubing idea. I cut them about two inches long which is probably heavy enough for any river. I carry about 15 per trip. Then I cut to length. I don't start short and add. I start long and cut.