I'd like to see that mill!
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I searched the web, but didn't find any pictures. And photography isn't allowed in the building. The closest I could find is this one in a company in California that makes skins for C-17s. The mill is in the background upper left corner. The ones at my wife's plant are about a hundred feet long, and can run up to four skins at a time, or two of the larger aircraft skins. The operator sits (or sleeps) in a control cab on a machine about the size of a small garage, that rolls on rails while straddling the bed. There are cameras that monitor the mill head, and the operator can switch out bits, and perform other operations right from the cab.
