I have recently bought a Jetlegend Viperjet and it has Turnigy servos in it. The plane has had 10 flights without a problem. I will check them all over before flying but at first glance only one is not good. It is HK15298B This has a lot of backlash in the gears, this one I have already replaced with a Savox one. There are some videos on Youtube showing some of the more powerful Turnigy servos being tested.

John