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| | A bodged repair to a rack made with a tin can and some plastic tube. |
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| | The rack restored to correct design with a new steel pin. |
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| | A badly worn bush. |
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| | A new bush inserted and broached to size. |
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| | A crudely made crutch pin guaranteed to create friction
against the rough surface. |
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| | A new bush pin made truely round and burnished to minimise friction. |
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| | A badly damaged snail suffering from many attempts to correct for wear. |
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| | A new snail has been cut and fitted to the hour wheel.. |
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