Won an Ebay auction for a really nice machine. It looks almost new. I air tested a dime at Ground and Sensitivity both at 10 and got just over 10 inches. I got a full 11 inches on a quarter. This was in my house where there was plenty of EMI, so maybe it would go deeper away from EMI. One thing I noticed right away was that I could run sensitivity all the way to 10 without any falsing. This seems odd for a 102 machine - no?