HI GJAUBIN! Flaperons will lower your stall speed and give you more margin for error when you slow your plane down. Planes that don't have much surface area on the flaps don't stand to benefit as much from switching to flaperons for aerobatic purposes. A typical 40 size fun fly sport plane has flaps with a 3 or 4" chord. Think about building yourself a set of large flaps if your plane isn't already so equipped, a 1/4 by 1/4 hard balsa stick framework will do. If you would like to get maximum benefit from switching to flaperon mode, couple them to your elevator so the elevator moves opposite to the flaps, this will wake up some mediocre performing planes and make them more fun. I fly in this mode always except for hovering and knife edge, and that's when you want your plane to be more sedate.