Thanks guys. That's really useful and got some ideas to add to my Santa list even if they arrive after the big day.
I'm a student pilot in a C152 so wouldn't want to dumb down in skills of flying my quad using the controls before 'cheating' with FPV
The return to base stuff would be useful for changing battery when it's running low.
@unmannedtech - I'll have a pop again at librepilot in terms of the switches and if still no joy I'll start a new thread.