One way I use it, is to tell if in corn I have the lower sieve too tight. If needle goes completely over right, and I stop and it takes 5 to 7 seconds for the needle to settle back, I have the sieve a notch too tight. For corn and beans, for the shoe, I set for the most sensitive setting, and set sieves so I occasionally see a kernel hit. For flatlanders, I would like the sensor "pad" across the whole width of the shoe,(Class_lexion does this) as I might have loss at the center, but none on either edge, but don't know it. I could add another pad at the center, I've been told.