I was wondering if the X-Terra 505 can be adjusted to find the "junk" and not worry about coins and so forth. I am cleaning a old right away and specifically looking for railroad spikes, big bolts, and other steel/iron. I know most people want to discriminate the junk, but I want to find it and not anything good right now. I know there could be enough variety on the acres to have it beeping all the time as I noticed on a buddies that showed me his. Thanks for any help.