I know this question has been asked a thousand times and I've read quite a few of the answers. But I thought I'd ask it one more time for a little more clarification. I've got some sites with low to moderate trash that aren't producing silver and older coins like they used to. Understandable, they've been hunted to exhaustion of targets. But I'm wondering, hoping maybe a larger coil might reach down just that extra inch or so to bring the sites back to life. Therefore the question is for my Explorer SE Pro does anyone have a coil they would try under these circumstances? I have the Pro coil and the SEF 10 x12 dd coil. They get deep. But can I get coin sized objects any deeper and what coil would best accomplish that? Thanks for any advice.