Stop it! Stop it already!
The Cibola aint a Compadre.
They're analog machines, Id bet no two Cibolas are the same. I'd also bet if you air test a nickel and then test a nickel you buried, you're get two different settings on your dial. I'd bet the nickel setting on your dial will change day to day based on the stars. I have a buried nickel in the garden. It changes where it discriminates out on the knob based on the angle I sweep it and how high off the ground and the moisture in the ground.
I'll give you some free advice this morning based on my observations and history. Sell all of your Tesoros and get you the latest F75 LTD DST Boost whizbang. I have one, you'll love it! It'll identify a nickel, tell you where it is, and exactly how deep it is. You'll enjoy many many hours playing with it without never going outside. It's even has a mode for when the grass is a foot deep and not lose any depth in the soil! No motion pinpointing and all metal, several all metal modes with tones, you can even adjust the pitch of the tones. You can set it up to imitate a Tesoro except it weighs the same as two Tesoros...
And you can go hound the Fisher boys on their thread and give us a break.
Just kidding old buddy! Have fun. Have to get to work.
Good morning.