I told Deve about it, and he included the information in his blog as if it was his own idea. It was originally used as a method of setting the ignition timing on 1928-31 Model A Ford engines by inserting a "timing pin" into a notch in the the camshaft gear through a hole in the timing cover, and adjusting the distribitor to fire the #1 spark plug.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!