v3a.stl - minor updated version:

• with extra strap mount (upside)
• NO explicit support material (you must use support material)
• strap mount smooth

v2a.stl:

• Explicit support material

Remix from http://www.thingiverse.com/jarradhope
Changelog:

• Improved nose slice
• Perfect fit for Google Cardboard lens (25 diameter / 50 focal length). You will find it on aliexpress.
• Added (hardcoded) support material, you don't need to print with support material
• Improved elastic holder
• Pin mark to align with screen center
• Elastic holder angle adjustment
  Tested with:
• Nexus 4
• Nexus 5
• Xperia ZL
• Galaxy S4
• See Instructions!

Printed with Prusa i3
Use:

• PLA
• NO support material
• 15% fill
• Glue stick to avoid unstick from bed
  For lens holder:
• At layer 5, (with layer width 0.3) pause printing and put the lens in hole (as seen in the photo).
• Print the lens holder separately, because printer travel can damage the lens.
  I used this elastic buckle scaled in 0.6:
  http://www.thingiverse.com/thing:268143