I have used some Power Hd on some sport planes before. I usually use the "namebrand" servo for my big planes. The specs are real good. I put them in a 50cc 3d plane that is flown very hard. They do the job for sure. Center very well, no blow back. Strong and fast. They sound loud, but all 5 sound the same, must be just how they are. $45 for servo this strong and fast is a great deal. (Posted on 7/8/2018)