I've got the 40 go find in the series. I like it, it suits its purpose. I haven't found anything notable with it yet however it doesn't have much time on it yet as I mostly use my safari. I did notice you will get some high tones out of small iron which is annoying, but the same thing happens with the safari in the soil around here. I did an air test with a silver dime and it picked it up at least 6" out which I think is good for a machine in this price range. I think I paid 170 bucks for it, with the intention of letting friends that want to detect with me use it and keep it in my vehicle for unplanned hunts. As far as leaving it in the car, my only real concern is the batteries on a really hot day. probably a good idea to take them out of the machine. Other than that the machine should be fine. There's a bunch of similar electronics in the car itself that survive the elements, right? I like the idea of having it with me, and I don't want to risk losing my good machine to theft or whatever.
theres a lot of videos on youtube about these machines. this one is pretty good that goes over the features.
also regarding being stuck with one coil, when I was researching before buying the go find 40 I stumbled upon this image:
which led me to this site, where a person says they had a shop add a connector so they can run whatever coil they want.
Another coil of Minelab Go-Find 40. Photo & video | MD-Hunter Blog
I'm assuming this would void any warranty
I will probably try to track down a connector/ wiring diagram and do this myself at some point, as I have extra coils why not put them to use?
One other thing to note is the collapsible feature can be handy in tight places a full size detector can't go or would be awkward to use. In it's collapsed form its about the length of your forearm so you can get it under low tree branches or use it against a steep hillside.
