Bearbear8888, I don't quite understand what you mean by "get one more miss", would you mind telling me more about that?
Do you mean that the voice read 499,494,489,485 (interval change to 4) and I should but forget to press the button here, then the voice keep reading 481, 477, 473.....if I forget to press the button at 481, then I will be counted as missing 2 times, therefore I should press the button whenever I find the interval changes?
Thanks a lot!