Originally Posted by
DirkW
You'll be fine without an HV Servo as the servo is powered by the BEC, not by the LiPo directly. Given that this BEC with 6V/3A isn't very strong and Savox servos are notoriously power-hungry, a glitch buster may be a good idea though as you might encounter brownouts otherwise,
3A will be fine for a Savox 1251. 2A or lower might be a concern. That servo does have a reputation for being power hungry from a long time ago when BECs were weaker, but modern high end servos tend to use a lot more these days.