Now have new DJI Goggles, but have slipping problems. I also have some other concerns like what is brighter, control options, convenience, portability, etc. I have an iPhone 6+ but too small. I also have an iPad 3 but dosen't work with DJI GO 4 app. I can take back the Goggles, but must do that quickly. I might be better with an iPad Minin 4 or ?