My new F2 just arrived yesterday so I hit an obvious spot today to try it out - the park. There was of course a lot of trash so I quickly switched to the 4" coil. One thing I noticed while scanning was when I got a hit say dime for example, after I would turn 90 degrees I could very seldom mark an x. Wound up using pinpoint for nearly every dig. Therefore I dug a lot of trash since pinpoint doesn't discriminate. Also nearly every penny registered as a dime before digging. My first time out was today so I'm sure I'll figure it out as I go. Also I found the top of some sort of ring & posted a pic of it over in the whatzit forum.