A few days ago I was at a middle school yard and came up on an area with cinders. They used the cinders for a sprinting track. There are coins there but the Vaquero was going nuts so I left the area. I did turn the sens. down a bit, maybe I should have turned it down a lot. I cant help but think that other detectorist avoid the spot also. any tips? My Vaquero has the stock coil.