First you need to differentiate between Spoilerons and Flapperons. Flapperons are ailerons that also drop down a bit as flaps, but still retain their full aileron function. Spoilerons are spoilers on the wing further forward and also act as ailerons when only one is raised. When both are raised they act as spoilers to kill lift for a faster decent.

When you start setting up you flapperons, you need to do so in slow increments if you are not sure how the plane will react. If you put too much flap action in, you could induce a tip stall tendency or inability to roll the plane (or bind a servo). I would suggest you wait until you have quite a bit of solo experience with the plane before you start messing around flapperons. When you start, add just a ¼” of flap drop and slow increase that as you start flight testing and learning the specific flight characteristics of your plane.

Hogflyer