I have only seen this feature offered by Minelab?
I have not tried this app, but it appears to have similar features:
Nathan never gave much details, just mentioned it would not be a rebadge. At the time, I believed Tesoro was committed to a modern updated machine? Currently I don't have much faith in the Cazador ever being born?
My thoughts on the shaft would be as a accessory item, that would be compatible...