when not using a power management system, you can always bypass the power direct to the servos from the RX, and just run signal and a ground into the Cortex. If you do this, then you are limited by the load capacity of the RX ( which is not much higher however than the gyro ) This takes a little wire juggling, but it takes the load off of the gyro. I have one plane set up like this .. another I am going into a powerbox so load is not an issue .
Voy