A friend of mine urged me to try divining, using two bent pieces of SS tubing. It worked. Yesterday I made a couple of improvements to his rig, wooden dowels to hold the tubing. It worked even better. I have no idea why or how it works, but does.
Only, when I am using the rods the Right one also unerringly locks onto and tracks panel vans. There ought to be a way to make money off of that.