Fair enough. The only Hitec servo I've ever used was an old 645MG as a replacement for the stock RTR servo in the RC10T4 that was my first hobby-grade RC. Of course back then I though adding a Kimbrough servo saver on top of the servo saver built in the the steering bellcranks was a good idea, so I might have been a little green back then and not really paying attention to what screw size fit the servo