I want to add flaps or flaperons to my Nexstar trainer to slow it down a bit for landing in an old field by my house. I have an 8 channel transmitter and receiver but I need one or two additional servos. I have two Tower Hobbies System 2000 TS-51 standard servos. I believe the TS-51 is for RC cars and trucks. Does it matter? If so, what's the difference?