The eclipse radio will only do "crow" in glider mode. It will NOT do crow in the airplane mode. It also doesnt have any provision for any kind of "curve" in the mixing including a throttle curve[
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It will do split elevators. You just have to mix the elevator servo to to the appropiate channel on one of the custom mixes for the other elevator servo to work. Same thing with using channel 5 for for the other aileron servo on a 5 channel reciever, works great. The eclipse has 5 custom mixes available.
I have had one of these radios for two years and have had no trouble with it. I just wished it would do curves on the mixing other than that I wouldnt want another radio. The eclipse is probably the best bang for the buck but, I now am wanting the 9c.