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# Case
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## Strap attachment
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- Interesting/useful
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- different watch band pins:
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http://www.esslinger.com/watchbandpins-illustrations.aspx
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- Expensive and
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professional:
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- http://www.outils-horloger.de/html/travaux_sur_bracelet.php?id=0090zg
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- Simple and cheap
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- http://www.rcworld.co.uk/acatalog/Threaded-Rod.html
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- Flush Standoff :
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http://www.accuratescrew.com/Locking-Fasteners.aspx
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- [Adjust
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rod](http://www.modele.sklep.pl/pl/Katalog/SMIGLOWCE-HELIKOPTERY/HIROBO-2522-039-Adjust-rod-M17X30.html?pp=28)
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- [Blind rivet
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nut](https://encrypted.google.com/search?tbm=isch&q=blind%20rivet%20nut%20m2&tbs=imgo:1)
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+ screw
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## Ideas
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- Add bi-color LED in the eye of the penguin (back of the case) to
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indicate charge status.
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## 3D printing services
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- http://impression3d.ch/
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- http://www.proto-print.ch/
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- http://nextdraw.ch/
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- http://www.shapeways.com
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- http://sculpteo.com/
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## FreeCad
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- http://my.safaribooksonline.com/book/cad/9781849518864
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