RE: Castle Berg 7P question?
While Castle might be happy that the receiver will handle it -- they seem to forget that 7x 5955 servos have the potential to suck as much as 10A. The three-pin connectors themselves have a 5A rating so unless you're using a power-box, the *single* connector that supplies power to the receiver is going to have its ratings exceeded.
On anything over 25% I always use dual battery packs, dual switches and dual power leads into the receiver.
This is *especially* important with 2.4GHz since you don't want all those hi-current servos overloading a single power connector to the point where the voltage drop causes a reboot.