Also, if you have a computer radio, and you have decreased the end-point adjustments (servo travel) via the radio, then you may see that there is not a directly linear proportion between your stick movement and servo movement. One of the reasons I like to set up the throttle mechanically as best as possible, then use EPA as a last resort. If you decrease one endpoint by a lot (say 40% or more) then this will be very noticeable!