Journal Pen Holder

This is a writing instrument (i.e. pen, pencil, etc) holder that could be attached along the fore, head or tail of the journal/book cover instead of the spine.

Diameter of the pen, thickness of the journal/book cover and width of the holder is adjustable using OpenSCAD or Customizer (http://www.thingiverse.com/apps/customizer/run?thing_id=1782329)

Updates:
24/9/2016 - Bug fix. A small gap appear on the bottom side between cover and pen clip.
22/9/2016 - Added option for printing position