Having no RC background, I hope to get some answers on the following questions.
-How is the RC receiver powered in the Arducopter setup when following this . Is the receiver powered through the APM?
-I read that you have the choice of powering APM & IMU with the regulated 5V from one ESC or a seperate BEC. If I chose the ESC. is this directly connected on an output? (All ESC's connect to the output of the APM)