Both clad dimes flickered between 25-26, exactly the same way. I find that interesting. The TID on a shallow target should be rock solid (according to all we have read). Therefore, I think that Minelab may have calibrated the clad dime to fall BETWEEN 25-26. Steve H. are you at liberty to scan a clad dime and see if that is true?
btw, if they can calibrate a target to fall between two numbers then the 40 points may theoretically be 80.
If I saw a flickering 25-26 every time, that would excite me! I don't know for sure what the silver dime TID is (I think it may be 26-27). Assuming the 26 being the median, If it falls 26-25 it's clad, if it tips 26-27 it's silver (I'm guessing).