I was down the park yesterday & was approached by a bloke asking if I find much? I showed him what I had got so far he then told me of his brother who had lost a silver cross there while doing footy training. The cross was approx 1 inch I don't usually search on playing fields so my question is what VDI can I expect so I can notch out unwanted numbers so as not to dig unnesesary targets. Thanks. Dave.