I changed my the design of the middle part of lens. It is more convenient .
The wall thickness of the box there is 1.5 mm. If they were thicker - will increase printing. Use a rasp to expand the holes, if necessary.
This back cover is not very convenient. If it will not fit to your phone - use the rubber band.
I ordered a silicone suckers for the back cover. The phone will not slip.
Watch for changes!
Printer: Prusa i3
Rafts: Doesn't Matter
Supports: Doesn't Matter
Print all parts lasts about 5 hours. Use the glue to fix.
Google Cardboard kit upgrade 1 by TanyaAkinora is licensed under the Creative Commons - Attributionlicense.