Customizable FitBit Flex Arc Band UPDATED

My previous, flexible Fitbit band works great for me, but my wife wanted something a bit thinner, so I came up with this. It's a simple, solid arc that fits around your wrist, with a cutout to precisely fit the Fitbit Flex.

Customize to your own wrist size!

Updated:
- added a 'width' parameter, so that you can make the band wider.
- added support for unlimited width, so you can make a crazy wide band if you like. Uploaded example STL.