Also - and very important - experiment a bit with the neutral setting of your ailerons. You may find that your plane will track better (and not tend to balloon up on landing approaches) if: Both ailerons are definitely not drooped down past neutral whatsoever even a tiny bit, and your landing approaches and? high speed passes (upright) may be cleaner if they are reflexed (just baaarely brought up past neutral) just slightly. Do not ever use a Y-cord to the ailerons servos. Wire them separately so that you can use one click at a time of sub-trim in the radio to find your best neutral setting whether you are trying for smooth landing approaches without ballooning up or for high speed passes....

Ernie Misner