The HS225 and 5425 is an abomination of a servo and one of the very few lemons that Hitec has made.

In trying to cram the torque and speed of a standard servo into a mini package they've sacrificed the strength of the gearset and the longevity of the motor and feedback pot.

If you search RCU's archives you'll find many, many instances of HS225 failures, ranging from broken gears (even in the MG version), burned out amps, lousy centering due to worn pots and a number of other issues.

The 5425 is just a digital version that shares the same gears, pots and motor as the 225 so the same problems plague it.

I wish Hitec would stop marketing it as "the mighty mini-servo" and effectively convincing people it's a suitable lightweight/small-sized replacement for a standard servo in most applications it's not.

The only people who seem to have had any real success with these servos are those who use them on very fast models that have tiny control surfaces with minimal throws. Due to the mechanical advantage such a setup allows, the servos are barely stressed in such a setup so tend to work modestly well. Try to use the quoted torque figures however, and you take a *big* risk of breaking gears, burning out amps and wearing out feedback pots.

Hitec make some really good servos this is not one of them.