I installed these on cyclic and tail rotor of a T-Rex 470L.. Linear response of servos very good. They do run slightly warm and have a soft growl, but considering the metal case for heat dissipation and precision positioning, all is good ! Torque seems very adequate and the metal gearing is smooth. The case is a little deep for the 470 but using a 1mm shim to mount them solved the problem Overall I'm very pleased and would recommend them for a 470 or less size helicopter. The price is great and E-Max USA shipped them quickly.
