Im a little worried about amp draw through one lead myself but I think for a jet you dont have high amp loads like a large 3D plane that you slam the controls on every axis. I am trying to get info from futaba on this but from what I have found so far Robbe has a great solution.
http://shop.rc-electronic.com/e-vend...&c=1786&p=1786
the sbus powerbox with the hub is a perfect combination, the hub allows for anothe battery just for the servos and has larger lead wires for higher amps, you can even just use the powersystem without the hub. Robbe makes the lead your servos plug in with higher gauge wire. My jet I will be working on soon has tons of servos so using this system will save some weight just by cutting out 50ft of servo wire LOL