vario makes a special gyro for 4 pont ccpm swashplates. basically the gyro controlls 4 servos to move the swashplate up and down and cyclic controll .... i can see one of these being used to connect to the ECUs, (all 4, just like servos for the swashplate controll)
the cyclic gyro would then controll the 2 axis in the hovering plane. the gyro would add/reduce thrust as necessary to keep the craft at a stable hover .... put another 2 HH gyros between the cyclic and the receiver , and you have a rock solid hold on the hover. ....

give me the $$$ and ill show you how it can work
Wojtek