RE: 123 battery setup
Pete
Using two 2 cell A123's through two Fromeco Kodiak switches, these do not regulate the voltage, but give a Mah reading of the used power, I have eight digitals and one analog servo with no detramentle effects noticed so far after 30 flights using them.
Mike
EDIT: additional information, Rx FASST FS6014, servo's all Hitec.