I took one apart: (1)motor is twice the size of a typical servo (2)pot is connected to circuit board by a connector instead of solder (3)motor has a leaded part (guessing a cap) soldered across its terminal (4)the leads of the cap get soldered to the board (5)leads have braided sleeve to insulate them (6)servo amplifier appears to be their own design (7)two large transistors are used to drive the motor (8)all gears are metal including motor pinion (9)gears are well lubed (10)grease appears to have already collected metallic particles with a few cycles back and forth (11)motor appears to be press fit with no screws used (12)wires are awfully small gage about what you'd find on a park flyer servo (13)wires exit without a restrained grommet (14)no staking adhesive used on wires.

Performance wise, servo is extremely powerful. I can't stall it with my fingers. Holding the arm before moving the servo is the only way I can stall it. The metallic particles I found in the grease appear to indicate very fast wear on the gears. Servo is very very quiet at idle. Centers very well with no oscillation. A little more backlash than say a ST125. Speed is comparable to most analog servos.