Hi guys, I need some expert advice please on a maybe complex issue. I have an Inspire Pro Black, still running on FW 1.4. RC 1.5.7. Very happy with it except 2 issues. Camera has yaw drift and the bird does not fly straight. I updated the camera on a friends Inspire to the latest FW and I still have the yaw drift. I think a later FW fixes that. Anyone knows which FW that is ? So it must be bird related. All calibrations done of course. I heard FW 1.5 had battery issues where they would shut down in mid-flight. Is that true ? My batteries are all up to date with latest FW. FW 1.4 has been otherwise rock solid, none the reduced range, speed, etc of the later ones. But I need to address the yaw drift, and the not flying straight matter. Is FW 1.5 safe to update ? FW 1.6 has the reduced power apparently which I want to avoid. Pls let me know. Alternatively, if I update to the latest FW, is there really reduced range, speed, etc ? Heard, read many complaints about that. Thanks.