Flap mixing
Each airplane has its own personality. With my Top Cap when I mixed some spoileron, or up flap with up elevator it stabilized it made it more stable in a elevator. Without the mixing I had lots of wing rock, but with it the airplane would come down 45 degree plus descent with flat pitch angle. With a couple clicks of throttle it would change into a harrier. I've had other airplanes if you tried to use spoilerons it turned into a brick. Just start dialing some in and try it. Tom