I use the one from the rctrayman that was mentioned earlier.Saw the price on it at the Ama show in Ca and almost died can't believe a cheapskate like me would have spent that much but Ilove it!Also have several others all work good.Am very unconfortable trying to fly without it.Can let go of Tx to do trim on planes realy nice that way.As Isaid earlier the thing is Ican't stand to fly without it that is why I have several with various Tx in them!Guess everybody to there own choice!!