Hi I just bought a used whites tdi SL SE with the miner john 8x12 coil. I have heard mixed reviews on this coil and smaller gold. Anyone have a coil they want to get rid of for a tdi? Jimmy TDI, coiltek, razoback, Nugget finder coils. I only prospect for gold around rivers or any reviews or feedback on the miner john coil. Thanks! Nate