A bit confusing to me, but I'm sure that our experts can improve the explanation.
He started on locks seriously that when he was on the Manhattan Project. He drove security nuts, he picked the locks on every door and cabinet he found.One of the most brilliant and most interesting scientists our country ever had. There are several very good biographies - my favorite was "Genius" by James Gleick.
His autobiography is called "Surely You're Joking, Mr. Feynman".
One thing I remember: whenever Feynman took a new job, or position, the first thing he'd do would be to go around to all the other scientists' offices when they were absent, and crack their safe open and leave some cryptic note. Apparently he was a skilled safecracker!
Leemell: what a treat to shake the man's hand! Good on ya.
I believe flat refers to a special type of conical.The rod connecting the two wheels is called an axle.
BART's wheels are "flat," i.e., not conical, at least according to the BART article at Wikipedia (though there don't appear to be any sources verifying that assertion).
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