This is a big scale vario helicopter with lot of money and time !
All is about security, failure of one receiver or RX cable or... Where full double path is more secure than a single path receiving diagram.
BUT I agree that the box can fail, a servo can fail, pilot can fail (
)....
I always used this kind of wiring for my big scale gliders (also expensive and time consuming), but here this is the first time that i have gyro into the receiving chain (between antenna and servos). For my 600 helis of course 1 receiver (spirit GTR) is OK (and they never failed !)
If somebody nows how to improve security in this area (cat B certification for >25 Kg models)
Thanks
Laurent