Good observation Bob. The Astro Flight speed control does have a BEC circuit built in but I am not using it. The primary reason is that it’s a very unreliable source of power for the RC system. There is an awful lot of circuitry between the BEC output and the motor batteries. We call these things in the aerospace industry “single point failure sources”. I prefer to have the receiver connected directly to the battery with only a switch and a couple of connectors in between. When the connector from the speed control is plugged in to the receiver, the BEC voltage was applied right across the plus and minus bus of the receiver and I was using two of them with a “Y” connector. This was disabled by cutting the red wire coming from the controls. The guys flying the large electrics use a separate RC pack for the same reason. If the BEC or control gets toasted they can still make a safe landing. If this happens in the boat, I can still motor back on the one surviving control. So far, no failures of the AF controls in the past 10 years. Here’s another image in the sun. You gotta love the "sky hook".Dan.