I have an Inspire 1 v2. One poster claimed he used his x3 for video I assume because it flies smoother with less weight. Is it difficult to go back and forth between the X3 and X5? Do you ave to apply the firmware each time you switch? If you can go back and forth, it would be great if you could rent the X5 when you need the extra quality, Does anyone know of ant place that rents the just the X5 lens?