I was able to root my Crystal Sky by CAREFULLY following the instructions I found on the nolimitsdronez.com site. Go to the menu, select forums and then select the first topic “NLD MOD client users guide” then scroll to bottom and select “How to: Rooting DJI Crystal Sky”. Spend a lot of time reading the directions, download and extract files for rooting into single directory (Windows PC or emulation on Mac). I was able to install Google Play Store and Services and they work perfectly with no errors. I can install almost any app directly from the Google Store. The best thing you can do before starting the process is reset the Crystal Sky to factory settings and then manually re-install the Crystal Sky firmware.