Well, I have been using my G2 for the last few times out and I decided to take my GBSE with the 11" coil out for a spin yesterday. Well, it does hit on the higher conductor coins. I found this Conterfeit $5 gold coin at 10" in real rocky soil. The field has been plowed, but it is a Union CW Camp that I have been hunting. It is copper. Settings for the GB were sens 99 and disc at 35 and yes the spot is full of old square nails. I guess this coin was gold guilded at one time. It looks really convencing.....MO