I just bought the helix rack and a helix controller cause it was not talking to my Roland fc 200. My question is before my controller arrives, I notice that DC input is for future use? How do you power the controller? I am making a wooden board were all the controllers and EXP pedals will be and before I start laying down how everything is going to be arranged I need to know about the power delivery of the controller. Also how much voltage if it uses a DC. Thanks