RE: Servo gears?
Well, Plastic/Nylon gears are more precise then the metal geared servos from what I hear and thats what the Futaba servos use, or most of them anyways. The metal gear servos give more torque though if I am not mistaken. Im no expert on this but I would say for 3d flying Metal Gears, for Precision flying Nylon Gears...
Steven