Hi John, I learned that one when I first worked in Electronics Factory for summer work some 30 years ago. Still remember it. Also the Mosquito issue I first qustioned also 20 years ago nearly. Imagine carrying all this responsibility all this time...When I posd it to our family doctor as a what if thing, he laughed at me Ignorant fec...er
He wasnt much of a doctor either.
I have another few which I must put up...In good time...