HKS makes a metal gear servo that is physically identical to the futaba 9650. the 9650 with these replacement gears is popular for cyclic control on 500 size helicopters.
Interesting but the Kimbrough servo savers we almost all use are so soft that I have never seen a 1/12th break a servo gear. Burn some up yes but never break.
I actually wish they would make a stiffer one.
