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Old 10-06-15, 03:31 PM
  #12  
Earl Grey
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Join Date: May 2011
Location: Midwest
Posts: 369

Bikes: '10 Fuji Cross Comp, '12 Brompton S-Type, '14 All City Mr Pink

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Superglue small neodymium magnets at the appropriate two heights inside the seatpost, and carry a third as a 'detector'?
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