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The motor brushes seem to be a pair of stiff wires
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Tweak the splines / control points, add a few more nodes
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They’ll get used no matter what they look like
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Bashing the chunks with a fork got tedious
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Scan the bottom of the cap to get a high-contrast image
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The red disk in the middle of both wounds is new this time
The Smell of Molten Projects in the Morning 