Hi Michael,
Thanks. The little I2 flies great now that I have it dialed in. Yes, I have tried the Sony card that came with the I2 and my Sandisk cards. I just finished running a test with H.265, but windows 10 does not support it any longer. I doubt that it would make a difference. The funny thing is it doesn't have any issue with 2.7K @ 60 or 47 fps. In 1080 119, 60 and 47 fps are totally unusable. Looking at the bit rates for each resolution it is pretty clear that DJI just dropped the ball and went with a lower bit rate that just isn't fast enough for these frame rates.
Wayne Mann