This is what I was going to suggest. The rods are merely a catalyst to free your "intuitive senses" or whatever; noticing subtle depressions in the dirt, the ar

This is what I was going to suggest. The rods are merely a catalyst to free your "intuitive senses" or whatever; noticing subtle depressions in the dirt, the arrangement of foliage being "off", etc. might be more apparent if you weren't looking directly at them (as counter-intuitive as that sounds, no pun intended... But tell me this- How many times have you come up with a solution to a problem long after you were directly thinking about it and while doing something entirely different? Because that has happened to me MANY times, I'm sure it's happened to many people who will read this, and is JUST as difficult to "prove scientifically")