I think a lot of bad rap (or bad post) about the CS started out with them having bad coils and not really knowing it! I bought mine and I thought what a piece of junk! it was nuts. You had to run it at a sensitivity setting of 2 and the threshold of -40 and still was nuts!
It kind of acted like a metal detector but just a real bad one. US quarters would fall into penny/dime range, copper pennies would fall into Zinc range, nickles fell into foil range or iron. Much of the trouble I had with mine I found in other post of CS haters. The only thing that saved me was a co-worker order one off ebay around the same time I did and he kept on saying he really liked his, well one day we met up and he tried mine and said it was screwed up! so then we switched control heads then his went nuts and mine ran like a real detector. So, I found a forum member here that had a OEM CS coil and the rest is history, mine has ran like a real detector ever sense.
I can't prove it but I'm pretty certain that they were a batch of bad coils that got out of the factory for the CS. If I hadn't had another to compare it with I would have just thought the detector was junk and had to have thrown it in the trash, I couldn't have sold it to nobody, I really thought I was stuck and with no money to buy another detector.
With the bad coil the detector acted like it had BAD!!!! EMI problem's so bad that you couldn't find a place that it would run. It would false, it wouldn't bell tone over a car hood @ 1". it that condition the detector was JUNK! The coil switch was just a last ditch effort. I kept thinking I didn't have the smarts to run it, I set everythign everywhere and I never dreamed the problem was a bad coil.
The dislikes I posted doesn't mean I hate it, it was just some of my dislikes. One thing for sure it has an excess of headphone POWER! I'm thinking about getting a set of Gray Gost headphones with the volume limiter.
Mark