Hi Nick,
thanks a lot for sharing the GearVR Template. That saved us a lot R&D time 
While i was running the template without modifications on my Gear VR i noticed that the distortion/wrap of the viewports (left/right) doesn’t work right/doesn’t fit the lenses of the gear vr.
If i pan my head left to right, i noticed that 100% straight objects like boxes have curves/bend a bit in the middle.
That effect is visible with UE4 APKs/projects (4.7.4) only and never noticed on any Un*ty samples.
Don’t know how to capture the issue as image, hopefully my explaination is good enough.
any else has the problem or an idea how to fix it?
best regards,