Thanks for making mention of my new one, Mike. What I would add to the discussion is that to consistently find gold you need to really boost your accuracy--and thus, your time usage. Confirming your targets in all metal helps to accomplish this in that you are now getting a ton of additional information on the signal's: size, shape, consistency, solidity, and depth. Another important signal feature is how it relates to the surrounding ground. Those targets that put off a wide, drawn-out all metal tone will usually be objects that are corroded into the ground such as steel (bottle caps) iron or rusing tin. Because gold is such a good conductor there are a lot of signal features that will add up to a good response. Weak, broken, or inconsistent responses are much les likely to be gold. This is where good coil control skills to perform a few all metal test passes come in--allowing you to gather this information quickly. These skills will boost your accuracy a lot in difficult hunt environments. Also, in acquiring targets, all metal mode is much less succeptable to waves, black sand or changes in the ground's consistency. I've yet to see any detector that will perform better in discrimiante mode than in all metal mode.
cjc
clivesgoldpage.com