did you ever fix the servo problem? i got a 631mg thinking it was the best thing since sliced bread and cant even get it to move.
i have 2 cars, both with futaba mc800c esc's (bec5.8v) this servo is supposed to work between 4.8 and 6v, the standard servos in the cars at the moment work with their respective receivers (one futaba and one KO), but when I plug in the 631. nothin'.
I have the correct polarity on the servo wires into the receiver, and have tried powering from a receiver pack. i just cant figure it out...