I too can do grave dowsing. I just didnt know it was possible to be able to tell specifics with it. My rods are just made from metal coat hangers. Sometimes while dowsing, the rods will react in these ways.. when the are extended in front of me. they either cross or one rod remains straightand one will swing away from the other rod. at times the rods will swing away from each other. I can water witch as well. I have an Uncle who water witches using apple wood cut in a Y shape.