Regarding your experiences with divining, I’m surprised that you haven’t done any further investigation into a phenomena that so “stunned and unnerved” you. Be that as it may, you might consider performing a similar experiment, but with a seer stone in place of your ersatz diving rod. You might, for instance, take this baby out for a test drive…

I recall seeing this seer stone on display at the Daughter’s of Utah Pioneers Museum back when I last visited in 2002. I’m sure the nice old ladies who run the establishment would be delighted to have someone as eminent you place the stone in a hat and search for water pipes in their basement.
So what do you say, Dan? It would be fascinating to see you on YouTube demoing an honest-to-goodness seer stone.
Dude, it would be, like, totally empirical...