Howdy Odenscoils--
That torn down bar can be a lot of fun! I hunted a similar site a few years ago with the DFX and then the V3i. The main obstical was trash. There were 5 or 6 wine screw caps for every swing of the coil. Out of frustration, I had to increase my discrimination to reject EVERYTHING below wheat cent. Also had to use the 4X6 shooter coil. That strategy paid off with many wheat cents and silver coins from Merc's to Walking Liberty Halves and some neat relics and silver jewelry. I guess I'll never know how much gold, nickles or Indian Head cents that I left behind. Have fun and let us know how you do? Best of luck and ...
Happy Hunting!
Blind Squirrel