ORIGINAL: ela
if you really need a powerbox to get the camera working I wil say the Flycam guys really have a bad design.
It can make sense that it doesn't work on Fasst but when you have also tried the 9C i will say the design is bad. This should be compatible with most rc stuff.
Or that Futaba have a bad design. Lowering the signal voltage to 2,5V or something, when the standard have been 3,5 volts or something for decades that all manufacturers and aftermarket products like servos, powerboxes etc. use.
There also have been some issues with the compability between some powerboxes and Fut 2,4 6014 receiver. They had to go back to the manufacturer for a uppgrade in order to work reliable.
http://www.aircraftinternational.com.../PowerBox.aspx