Kinda what he said. If you want CROW with the landing flap position you just add the Aileron servos to the flap switch servo list, same if you need elevator trim change with flaps you can add the two elevator servos to the flap function, so there would be 6 servos in the right hand box. Yiu can then adjust centre, travel etc for the Aileron and elevator part. If you had a landing light you wanted with full flap, you could add that there too...