I tried a hard reset the H43D mount when I once had a positioning problem which seemed to clear up my particular issue. If you think you have a weight balance issue, the Phantom Assistant software allows you to move the CG. But my feeling is that even if there is an imbalance issue, the Phantom will simply correct it with more or less power sent to the ESC's to keep the bird level. A serious imbalance will obviously require more power from the battery and more heat buildup to the motor(s) being used to correct the imbalance. You can find the physical center of CG by placing the landing gear on a small round item like a pencil or similar, then determine whether you need to adjust CG.