RE: Hitec HS225MG -- any good?
I have 4 - MG ones and will never buy another one. They never center properly, I'm always retrimming the plane and they have developed real big time gear slop in about 100 flights. On the other hand I have 8 - non MG and they are OK on small aircraft, no more than a .40 size. As an experiment after you hook them up, grap the control serface with the power on and you can overcome the torque of the servo with very little pressure.
I will not use them on a control surface on any plane larger then a .40 size ever again.