Thanks Paul, although shortened by bad weather it was a good trip. I run a Zed and it didn't like the lightening (distant) over the last couple of days. The settings I find that suit me in the very highly mineralized ground I detect are High Yield/ Difficult with the Sensitivity on 12-15, Threshold 26, smoothing off and manual ground balance. The standout requirement is to swing slow, very slow, on ground that you know produces. They are noisy settings and I worry about missing the quite deep one but the Zed is noisy with any settings it seems.
On one spot where I picked up about twenty pieces for six grams I tried Bogenes setting on several signals, the response would still pull you up but the above settings produced a much clearer signal. Nothing at any real depth, the deepest just three inches.