on throtle I use a hs 55 !! no problems... don´t get me wrong, I agree in the statement that plastic is more precise, but for 3d flyin you need weight saving over presition, and I have seen the 81MG to be right on a diablotin like plane (bigger) with no lacks on power and not ripping apart. ...yes, I´m a weight saving freak
Did you notice that pylon racing motor mounts (radial) saves another 2oz?