From what I am reading it will burn the receiver up if you hook it up to 7.4 volts. I will probably run it on 6v for now with the new servos and in the very near future at least run positive wires to the servos like we talked about and get a bec for the receiver. I also wanted to make sure I didn't need anything else to run these servos. Do they Bolt right up? Same size and everything? I'm new to 1/5 scale and all of my vehicles now the servos are all the same type and size. I'm sorry I'm asking so many questions I just paid a lot for the pro and don't want to have a run away or anything.