stiopa,

There are a lot different kinds of mixing, that can help fine tune a plane. I have a Funtana that I mix 13% up elevator with rudder to get rock solid knife edge. I also use spoilerons programmed on a switch (both ailerons move same direction with elevator). I have 100% spoileron throw and it works great for Walls, Parachutes, Elevators, and Various types of spins.

I'll stop there and let some others offer more information.

Greg D.