I couldn't get the Movi LANC cable to control (rec stop/start) our FS5 or our A7S. I changed the camera settings in the App to Sony Multi for the A7S and to Sony LANC for the FS5 and neither worked. I searched around and even emailed Freefly's support on this and they told me they don't support Sony prosumer cams. However, I happened to change the camera settings in the app to Canon/BM LANC and record start/stop actually works on both cameras using the Mimic or the rear control screen. Just thought I'd share in case you are running into this same problem. I assume it works for FS7, as well.