[suicideneil]

You would need something like the Castle BECpro, then adjust it via the castlelink to output 7.4v- there are wiring diagrams for it on the castle website ( since it uses higher voltage than the rx can handle, the wiring is a bit more complicated ). I have a similar savox servo but it is only a regular 6v version ( ~270in/oz of torque @ 6v ), so I dont need to run an external BEC to power it properly.