I have been losing video connection from day 1. I purchased the Carolina Dronz mod, to boost the antena. The video feed drops about 45 seconds into every flight. I can still control the camera. I can move it up & down, just can't get the feed on the ST-10. I am in a populated area, tons of wifI around. Any suggestions? Is this normal? Having Control of camera but no feed? Or should I also lose control of camera? If it's TX / rx issue? Thanks in advance.