Hi guys, New pilot here, just got mine 3 days ago. I'm having issues with the Phantom starting to drift left and slowly picking up speed. I have to keep applying right stick to keep it hovering. There was no wind to affect it. If I switch to attitude mode, it's a lot more stable and doesn't drift as much. I checked the Naza software. The settings look pretty normal and it told me I don't need to do a calibration but I did it anyway. Seems like it might have gotten worse since I did the calibration. What is the most likely cause of this? Should I be looking into balancing the props? Should I recalibrate again but try to find an even more level surface? Should I try without prop guards? Thoughts? Thanks!