Steve, I think you are correct. I have often used the DFX to compare what I see and hear with the Explorer. The DFX has wrap around from VDI -95 and +95. One example of this, I think, is the way some Indian Heads will jump from the upper left to the upper right of the screen. I more or less see the screen as a cylinder much like we fold a sheet of paper. The right side and left side representing the most ferrous to the least ferrous. It appears to me that soil minerals are primarily responsible for this wrap around. A target does not produce a single response, time constant, but has properties of low, medium, and high ones. The microprocessor not only has to account for these but all targets in the target volume.