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 onThis is an MKS HV777A+ Coreless Titanium Gear Hh Torque Dital Servo with an Aluminum Upper Case. Specifications: Torque: @6.0V: 409.7 oz-in (28 kg