Servo: K-power P0300 / WK P0300 review

One corner of the mounting tab was broken of. I hope that is not a sign of poor quality of the plastic.

I estimate 1 degree of backlash in the gearbox.

The face width of the output gear and the gear before is 3mm.

More general about plastic vs metal geared servos

It is the output gear that is subjected to the highest forces (highest torque) (Compare the formula P=τ*ω (P=power, τ=torque, ω=angluar velocity)) (Each gear transfers the same amount of power (P is constant). Those gears closer to the engine, transfers power by higher speed instead of high torque) Why not make the output gear in metal and leave the others in plastic. This would combine the durability of metal gears and light weight of plastic gears.