I know what aileron differential is, why it is used, and how it works to a degree, but the when of their use have me confused.

I have an 80" Midwest Cap 232, just changed to a Futaba 9C to get a little more fine control over the Super Seven I was using. I wasn't confortable with the mixing for the twin servos.

Now to achieve a smother roll, it has ben sugested to use this fuction. yet no one has explained to me if the aileron top travel is the one reduced, or the bottom.

Just to coverthe bases the ailerons are hinged in the middle, and not like the hing of the new composits which is all on top.

I'm wondering if this is a guessing game of are there some fundemental guidelines that could help me learn the correct use.

thanks

bob