Seen a couple of you tube videos now were people are setting way points for the vision 2 plus on there iphone and then pressing go and the phantom takes of and flies to them way points and then returns to home. Is this a extra bit of kit (ie dji ground staion) that needs to be purchased as well or is this just a standard function on the vision 2 plus v3. I have a fc40 and love it but i really like the idea of this way point function i keep watching videos about but cant work out if its standard on the vision 2 plus or a ectra bit of kit that needs to bought. cheers guys