I like the Cortes.I use the Cortes because the meter gives me a quick clue before I dig said:
Unfortunately, NO detector knows the difference between a ring and a pulltab. It can only tell you the conductivity of a target. SO there's your clue, folks:
Dont look to have the detector ID things reliably - it cant.
Rather expect it to give you the right conductivity - that is what it is designed for.
Then you only need to know what falls into what conductivty range.
With this line of thinking, you can turn your Vaquero into a "Conductivity Range" detector quite easily. Here's how.
Get a nickle, a square tab and a zinc cent. Lay them on the ground and scan them while thumbing the DISC control up the scale.
When each of these begins to break up, make a mark on the dial face that correspnds to the breakup. I use a dot of bright nail polish.
Now you have a simple, functional "Conductivity Range" detector.
With practice, you'll find this to be quite accurate.
DO you need the bells and whisltes of the Cortez? No. Theyre nice and have their place and dammit, I want one!
But you can use the V as I describe and get the same basic function.