mks777All bought new. These were all hv777 (not 777a+). I have stripped a pinion on one servo, stripped teeth on one, and sheared output sp onThe MKS HV777 was the first MKS servo that I tried, and I have never looked back since. MKS already known in other flying circles, such as helicopters and gliders, they have done an amazing job now on their plane series too.