I've got an old cast iron strip decoy anchor mold around here somewhere. I could pour 4-5 strips at a time. The strips were wrapped around the block's neck. They were good for ponds and still water. For river currents, I used a spade bit to cut a 1.5" hole into wood. I'd make an Omega symbol shaped piece of 100 lbs. test solid stainless leader wire that I'd place in the cast lead while still melted to attach the line. I'd cut rings from a bicycle inner tube and attach them to the anchor to secure the anchor to the block's neck. Gil