I thought my H4B was perfectly balanced in the gimbal until I got it into cold weather. In sunny SoCal, it would initialize and quietly sit in perfect balance. In the cold of Chicago's polar vortex (about 32F), it would do the same but then buzz intermittently for a few seconds over and over. Buzz, pause, buzz, pause, buzz, pause... I've seen the same when the balance wasn't right but it was pretty **** well balanced. So I can't tell if it is still slightly imbalanced or if the gimbal is more of a wimp in the cold than I am, or both. Either way, it was annoying. Had to remove the ND (it was cloudy anyway) and rebalance to get it to shut up. Anyone else have so experience with the H3-3D in the cold?