Originally Posted by EXTREME FLIGHT
If you really want to become proficient at precision aerobatics it is imperative that you set up low rates. I am probably in the minority, but I use individual switches for each surface. I would suggest doing this until you find the amount of travel that works best for you, then you can put them all on a single switch if you desire. For low rates I typically set up 10 degrees elevator, 20 degrees rudder and enough aileron to allow me to get a clean and pretty fast snap roll. I like a fast aileron response and want the aircraft to have a good break and fast autorotation, especially on an upline snap. This makes it easer to maintain heading after exiting a vertical snap.
As boring as it may sound, start just trying to fly a straight line parallel to the runway while maintaining depth and altitude. At the end of the line focus on pulling to a vertical upline, exactly 90 degrees, wings level with a consistent radius and draw a straight vertical line. Do a stall turn at the top of the line and focus on keeping the aircraft falling straight down. Pull to upright exit using the same radius as you did entering the vertical line. You will be surprised how difficult this is to do consistently, but it is the basic building block for learning precision flight.
regarding aileron rate, if you have triple rate capability it's nice to have a low rate, snap rate as suggested above, and high 3D rate. that's my setup and I also have every surface on a different switch.