The Dexcom G4 Nightscout Case is made to fit most straight micro USB's and will protect the Dexcom USB port from breaking.
It is a good idea to apply a little zip-tie around the usb to ensure that it is fixed.
Click link for guides on setting up your Nightscout http://www.nightscout.info/wiki/welcome . Also remember to join the facebook page "CGM in the cloud".
The design can be downloaded from thingiverse here: http://www.thingiverse.com/thing:465593
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