I have a completed "Hammerhead PI board" designed by Carl Moorland. I have 2 of the military search coils that were on E-Bay. I used 1 coil to connect to the board and the other as a spare. I have the documentation in a folder. I have posted pictures, I have a$20 in the coil and about the same in the board. I would like to get $50 US and shipping. Thanks, Happy hunting,hope to be hunting again soon when the hands heal. Jim