I wanted to be able to find nickels without all the pulltabs, etc that usually hit around the same area. I used my cz3d to compare signals with the explorer and have came up with this setup. I used the learn feature with the smallest icon and then expanded it back towards the left. Seems like the deeper nickels would hit there. Seems to work real good for finding nickels without finding a lot of trash. I use this setup in real trashy areas like schools or parks where I only want to dig coin signals. Just go real slow and listen for the low tone. Just thought I would share....