This is really a simple question, but does anyone know if this radio (Futaba 4YF 4-Channel ) is compatible with Futaba Trainer Box FM. I currently have the 4 channel radio and my brother wants to learn to fly so this would be a christmas gift. I dont know if u can see in teh picture but in the 4 channel radio u can see their is a trainer toggle switch (top left) same on the buddy box.I am just not sure. Thanks.