Viewmaster reel viewing stereoscope accessory

Ever wanted to see Viewmaster reels but didn't have a Viewmaster viewer? Fret no more! Just swap the usual post card mount with this reel mount.

The lens focal length for optimally viewing the Viewmaster reels in this contraption should be about 45mm (about the same as a Google Cardboard lens)

This accessory complements this stereoscope:

http://www.thingiverse.com/thing:1108267

Prints easily without support.

Enjoy!