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The camera’s 640×480 VGA resolution is marginally Good Enough for the purpose
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That’s the differential diagnosis for shutter failure
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The old heater was good for barely 2.6 A
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You’ve already seen most of the pictures and stories here
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Plotting slowly helps old pens with low flow rates draw reasonably dense lines.
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Refilling a pair of defunct black ceramic pens didn’t bring them back to life
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That’s an easy fit with just a smidge of play
