Are you still running this original or did you get the DST upgrade?
I use an F70...not the F75.
Even though many suspect that Fisher could actually upgrade the F70 because it shares the same core "engine" as the F75 and the T2, both that are being offered upgrades, I don't think Fisher ever will.
It makes no sense from a retail perspective to upgrade a lower model with new features and elevate it to almost the status of a Flagship model.
That would be a sure way to numb or even kill sales on the top line, especially if the unit below it costs appreciably less.
As it is, woof has stated in posts on this forum that the marketing guys at FTP never wanted the word to get out very far about how good and capable the F70 actually is compared to the F75.
We who use the F70 and have seen what it can do know this already and we do try to spread the word, but the extra features on the F75 that are missing on the F70 are way cool and if someone has the bucks to purchase all the whistles and bells and wants the option to utilize those extra features who can blame them?
On other forums the F70 owners and the F75 guys do have lots of back and forth about the capabilities of both, mostly all done in fun and a joshing manner, but most of them begrudgingly admit we still seem to be able to find the goods with our "lesser" units.
Maybe one day I will get an F75 and all those extras, but right now I love everything the F70 can do and I discover more on almost every hunt, I don't miss what I don't have and never experienced using, and I seem to be doing pretty good with this thing, anyway.
I bought this unit on November 28th 2013, and as of today I have found enough clad and gold rings at melt value to buy a fully loaded F75 if I want to, if those rings are sold as jewelry instead of melt I could probably buy 2...or more.
Not to mention the silver and other old coins I have learned to find in some very difficult sites that other very experienced hunters with other top flight detectors never could.
Oops...I guess I just did mention it.
This detector has proved everything to me I hoped it would before I got it, and then surpassed all of it by over a million miles.
An upgrade would be nice, or at least an offer of one, but if that never happens I am pretty sure I will still be supremely happy and pretty darn productive without it.