Alan, regarding your comment of running two power sources into the controller, would you run BEC and a backup source into it or how would you do that? Forgive me if I'm misunderstanding, for example the Castle BEC pro has 2 outputs for voltage and I realize both of those could be run into the FBL controller is that what you mean?
The one thing I have learned the hard way on HC's is to put both the ouputs from the BEC directly into the HC unit. If using a SBus receiver the SBus wire will provide power to the receiver. The servos are drawing the amps so the shortest path to them is the best choice. I put one power lead in the Sevo 4 port and the other into the programming port. When I am programming I pull that lead and replace it when finished. Alternatively you can put a Y at the ESC connection and put the second lead there.
I did learn this after the unit reset during a flight. This is what is recommendated by Hellicommand.
Alan