Best Plunking Setup I have seen,
2 Bead Chains
1 Duo Snap
Tie your main line to the bead chain, the bottom end of that chain goes to your weight, I like to use between 4-8 inches of leader to my weight. The other Bead Chain take the Duo Snap and put it through the Big End, the Smaller End Secure it to the middle of the other Duo Snap, I use a range of leader lengths so you can experiment..