hahaha For fun last night while the main VR dev machine was rendering out, I grabbed the laptop and downloaded the Unity GVR Daydream/Cardboard VR tech preview and built a version of Firedrake VR for the cardboard platform.
Low and behold, it worked perfectly on my Cardboard system. It ran at 55-60 fps at full resolution on my S7)
The graphics are slightly different (due to my Cardboard viewer’s lens I think) But now I think I could release to the play store next week easy enough.