Consider the can of worms OPEN!
Special thanks to Ray for allowing me to test his creation. It took a little practice to make sure I was getting good readings. But, once I figured out the idiosyncrasies of this device, I had it giving me reliable, repeatable data.
So....Ray....How much do you want for this thing?!? (no, seriously, please sell it to me!)
And, of course, thanks to Harry for kick-starting our "thinkers" in the first place.