I would put the camera antenna back where it was. The camera is a balanced gimbal. Those little motors really are not made to provide much torque. Even a slight imbalance will wear them out prematurely. If you are using a patch antenna, it is directional and MUST be pointed towards the aircraft at all time. It does not take a lot to mess up a 5.8ghz signal. From everything you are posting, sounds like some interference. If you fly at a different location, do you have the same video range issue?