Figuring it all out...albeit slowly. Seems as though if I want to use the IGyro and still have power redundancy via a dedicated power bus, I will need to get a Powerbox in conjunction with the IGyro. In other words, if only using the IGyro with the JR1222 Powersafe, there would only be 2 servo wires from the RX feeding all 5 servos plugged into the IGyro. Seems this would be unacceptable on a large jet so apparently time to buy more stuff!

Still trying to understand the wiring diagrams for using the Competition SRS with the IGyro and JR sats...maybe someone out there has an easy explanation :-)