One problem with flapeons is that the entire aileron moves when the flaps are selected. That will end up restricting the amount of aileron throw on the bottom side when making a turn.. could get critical at landing time.

If you have never used them before, it may be best to fly the plane a few times without using the flaps at all, then gradually add throw to the flaps part until you are comfortable with the way the plane handles once you have selected flaps. I have one radio that has a dial that I can slowly dial in flaps rather than switch them in and out. But, I do not often use them. The Tiger 120 that I fly has separate flaps and ailerons, and the flaps are on a three position switch.. off, 1/2 and full, yet, I don't use them hardly at all. I just don't see the need for them with that huge wing that the Tiger 120 has.

You may find that somewhat differet with what you are flying, but I would think that a slow approach to using the flaps, in a flaperon setup, is probably prudent.

DS.