It just comes down to how Futaba and Spektrum names functions.  What's negative for Futaba is positive for Spektrum.  You can test it by putting in a lot of positive expo in the 6i and see how the control surface responds.  If it's soft at the beginning of the throw, they you know it's what you want.  If it deflects rather abruptly, then it's the opposite of what you want, assuming that you want to soften up the controls, that is.</p>


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