DIY stereoscopic VR addon for mobile phone and Google Cardboard lenses

This is a VR addon for mobile phone.

Optimized for:
Google cardboard lenses (45 mm focal, 25 mm diameter)
screen 130 x 70 mm (htc one max )
70mm eye spacing

Yet to come:
Eye mask to fit between the device and the user eyes for more comfort and allow head strap.

If you like the model and want to use it for different phone device, and eye spacing, please ask and I'll try to help.