many, many years ago.
Used to watch the one in the Exploratorium in Golden Gate Park.
@FritzCat Yes, that was the one I remembered too. Grew up in Marin and used to go to the Exploratorium and also the Science museum a lot. Good memories.
Ya, mine is running right now. Doing some fine tuning on it, but gaining on what it is telling me. Like delta G do to the sun and moon, and a couple other ideas.