I use solid core 1/4 pencil lead in a small piece of black rubber hooked to the snap of a regular swivel (not a snap swivel). Main line and leader are tied to the barrel of the swivel. If you snag up bad the weight/rubber will usually break off of the swivel leaving you with the rest of your gear. I always leave slight slack in the line on my drift because I use as light a weight as I can and I feel it gives it a more natural presentation.
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"You learn more from losing than you do from winning." Lou Pinella