Spent the last 3 days, about 8 to 10 hrs. a day looking for a buried cache. It supposedly has one of the 1913 Liberty Head Nickel and other very value coins. We don't know how deep it is, but we do know it's in a 5 acre area. It has fencing in and around the 5 acres, with out buildings and machinery. What I need help with is I don't know if the Quattro has the power with the 10.5 in coil. It's in a Ball canning Jar that may or may not have aluminum foil on the top. Would a bigger coil work or do we have to use something different all to gether? Any help would be nice.