i own futaba so idk if this will help but i will try. go into your flaperon setting and turn it on. then go into the flaps setting and adjust the amount of flaps you want to program in, stars off with 10 degrees and work your way up. prectice up high before you try to land, some planes dont do well with flaperons
if you want the plane to slow down try a different prop (11x5 or 12x4 if its s .40 sized engine)