Went back to the "hunted out" park, today. Yesterday, I found some newer change, a 1927 wheatie and a heavy silver ring (weighs just under 1/3 troy ounce). Went back today and pulled out some more zincs and two dimes--one being a 1942 Merc! I knew there was silver left here. It won't be easy to find, but I'm looking forward to finding them. I'm using basic settings: Park 1, 5kHz and the default settings for the rest. I'm really loving this machine!