coil wants to float to the top, so i zip tied some rocks in a sock to the shaft, ok that problem solved. I took it out to bout waist deep water the other day, and kept getting hits and i'd keep swinging over the target then it would disappear out of nowhere before i even dug???? I'm havin a hard time with the pinpoint all metal feature as well...it's kinda weird to do.....i need all the help you can give me thanks.