RE: First IMAC model
Not trying to start a war here but Hitec servos are fine in any model. They are good servos. Probably not as good as JR but certainly good enough. I know too many people running 5945s with no problems to warrant a switch to JR. But if you can afford it, go for it. No matter what you do, be sure to use 2 servos per elevator half due to recent flutter problems I've read about on the super extra. Good luck.
Ryan