Slipped you made your point but its gettin old now,maybe you should start your own thread.
Personally i don't have the knowledge or expertise to build my own detector or improve on existing technology so i really complain about technology i know very little about.
Maybe one day someone will work out what it is that's unique about gold thats detectable and separate from all other metals.
Until then we make the best of what's available and what we can afford.
For me thats going to an SDC2300 soon, i dont care for the upcoming minelab detector who really wants to dig up to 3 meters? only a select few i would imagine.
These specials have come just at the right time for me so im happy for now.