i also took sam's class in mid seventies. one thing he taught was to look for '' lost rays '', that is if something is lost. at that time i had a Carl Anderson antennae rod. after hurricane Frederic i lost a little piece of plastic off my chainsaw while cuttin up an oak tree that the wind blew down. i looked for a while and gave up, until i remembered my antennae rod. i got it out and concentrating on the plastic piece and lost rays i got a direction from two different spots. then i got down on my hands and knees looking and found it in about a one foot circle of the dowsed area. i don't remember now what the plastic piece was for but i had to have it to keep going. it was very small too. well Treasurefinder and Signal Line,
maybe the lost rays will work for you too. good luck, !0claw