Roughly six months after we covered the original Airframe car vent mount, Kenu has released Airframe+ ($30), a tweaked version capable of supporting larger devices. Now capable of expanding to fit devices with up to 6″ screen sizes (including both of the rumored iPhone Air/6 models), Airframe + ditches the gray accents of the original model in favor of black, and offsets the car vent mounting point to be closer to the center of a larger device.…