Get a piece of plastic construction gas or water pipe.6 or 7 inch DIAMETER.Wrap WITH 1/2 INCH SCREEN TO SPRAY PAINT GRIDS ON IT.Hold screen in place in place with electrical tie ons.Drill your holes in the grid openings.make them 3/8 or 1/2 inch for fast drainage of sand.I cemented plexi-glass on the bottom and drilled the same way.Let enough room up front to form the scoop part.For the long handle I use both 3/4 wood and a 3/4 inc plastic mop handle.Both handles will float.I secured the handles with heavy electricians tie ons to the bottom of the scoop.You can drill a 3/4 hole on the top and slide the handle in to make it stronger.This way there is no metal,so you can just wave the scoop over the coil to see if your target is in it.It also saves your back.Make sure you use heavy wall construction pipe.Hope it helps.
Jim Pa
Jim Pa