Ron,
I was getting about the same depth as my CZ's. Of course, the F75 I found so noisy that I had to lower the sensitivity just to be able to deal with it's audio output. I had more confidence in the target ID info of the CZ because the TID's of the F75 usually jumped all over the place, so my thought was "no additional depth" and no additional target info that was consistent, so why not just go back to the CZ, at least I know what it is telling me, minus the headache. Also, someone said something about having multiple targets under the coil as being the reason for what I thought was a lack of stability. When I began using the F75 I dug nearly all the targets as I usually do when trying to learn a new machine. Where I hunt at old farmsites there is not often the density of targets that some of you are use to at city parks, etc. Most of the targets I dug were single targets, yet the TID's were commonly over a range of 10-30; you would think on a single target that the TID's would come within a range of 3-4. I tried different sweep speeds and sweep widths, but that did not seem to help much. The manual claims the most accurate TID comes with a fast shoulder width sweep. Some pull tabs, lead fishing sinkers, and crown bottle caps gave a fairly narrow range, but they are about the only targets that ever "locked in" to a narrow range for me.
