We currently have a DJI P4 RTK, which works pretty well after we correct the elevations with a few GCPs, but apparently PPK still does not work in the US. We want to add a backup sUAS and became very interested in the H520E until we started to read about all the issues in this forum about using its RTK and PPK. We want a turnkey system and it seems like we can expect the same glitchy performance and zero support from Yuneec as we get from DJI. Please post your good and bad user experiences with the H520E RTK and its PPK.