ISO advice on roof box for 2016 GT with raised rails...plan to add either Thule or Yakima crossbars, then a box, for a safe and secure cross country road trip...i like the Thule ForceXT or Yakima Skybox, but they and a lot of other boxes seem long for the cx-5 and its relatively short roofline...also wonder about clearance over the fin. Any experience/recs GREATLY appreciated. Thanks