How about people post some air test data on current day nickel, quarter, dime, and perhaps a nice mercury dime for silver and we see if our machines compare well. Give setup parameters - mode, recovery speed say 3?, sensitivity 25 if you can - 20 if you can't (say so). Really keep everything off the ground so it isn't a factor. No penny or ring data as that seems to be too variable. Remember to say if 600 or 800. Give the number where the target is definitely good and would breakup if held out further away.