After weeks of thinking, I found a small gold chain and waved it in front of every metal detector I owned, in all metal, and Nothing-EXCEPT my '60's Garrett BFO, the dual-coil Hunter. Now I know it just sits in the corner and I'm surprised the electronics haven't become brittle-and I almost skipped even turning it on. But it picked up the tiny gold chain at 2'' easily. And, I won't have to worry about small nails, hairpins,etc., cause it's automatically, because of it's frequency, going to reject them. Will try sometimes this week and let you know if a bfo is my new tot-lot machine!