I have my Quadcopter (Phantom 3 Advanced) being delivered tomorrow. I have a Micro SD card loaded with the latest Firmware .Bin. I am ready to Calibrate the Compass. I have read the manuals several times and watched numerous videos. I will exercise all caution and hope to be able to take off and return home without going too far away...very close in line of sight. I do have one question. Do I need to update the IMU? I am not really sure what the IMU is or does. Does the Pilot app tell you if it needs to be updated?