I just flew my 10th flight and I noticed when landing, I loitered at about 6 feet and the phantom was vibrating big time almost a wobble but stayed in place without any problems but you can see the gimbal vibrating , almost like a prop was major unbalanced or somethihg. This bird is only 3 weeks old, installed all new firmware, IMU and gimbal calibrations, props are beautifully balanced...what 's going on? It seems to stop vibrating when ascending slowly...Any help please? Thanks