I've noticed, both with the Inspire 1 and Inspire 2, slight variations in altitude. This is more evident when flying close to objects where there's a bigger reference than the horizon. I don't think this is related to obstacle avoidance but wonder if there's a gain or sensitivity setting I should look at. It happens in GPS or ATTI mode so possibly something to do with barometer accuracy. Any ideas?

JerryLaurence, you could try an IMU calibration, that may help. Keep in mind though even on a calm day your aircraft will never sit perfectly still. Safety First! Ken.