Additional:
I have purchased a Zero, downloaded Multiwii, and bought a mpu 6050 gyro.
Now to find out how the interfaces work.
I also need to find a supply for trimmer pots.
Any ideas? - does the Arduino shop sell this stuff?
Do I need a shield to mount stuff on? which one?
Possibly 12 inputs from the transmitter plus 5 PWM new outputs may be a bit much.
The only way I can get the channels is to run it through the Matek F-765, off Rx s-bus.
That also has an excellent 5V output.
The only non-massaged, non-gyro item is the thrust motor.
that can stay on the Matek. I don't really need arducopter for this- maybe Inav??
I will have a look.
Can I channel the inputs onto the Zero board a bit more neatly?