relic lover --
I see you are from western PA -- I'm a western PA native myself! Where abouts are you from?
Anyway, I saw your question about ferrous sounds on the CTX. While you CAN run that way, it's a whole different beast from the SE Pro, because of the way the ID numbers are set up on the CTXZ (and E-Trac). As you probably know, most all good targets' FE numbers are "normalized" to "12" -- totally different than the Explorers. While you CAN run a "two-tone ferrous" setup, for instance, which some folks like to do (as you really are trying to key on targets with a ferrous number around "12"), I think you my find that the better way to run is using "combined" tones. It's hard to describe until you have the machine "in hand," but basically you set your iron targets into one "audio bin," and assign a low tone to those targets, and then you set up four audio bins of various conductive IDs -- say 0-11 at tone 1, 12-15 at tone 2, 16-30 at tone 3, and then 30 and above at tone 4. That's just one example, you can set those bins however you like, based on the types of items you are targeting. Bottom line is that this is a very effective way to set up the audio on a CTX.
Just my two cents.
Steve