Dntmn- I have an Eclipse also, didn't want to use the mix for elevator servos so I used one of the Y's. Worked great for 26 flights; on the next I got a wicked snap (one elevator half went to full deflection), then another, then no elevator at all. When I got to the plane the Y was shrieking like a digital servo. Lost the plane utterly (WM Extra 80") and the gas engine attached to it. I don't know why the Y failed but for sure I would never put one in an airplane again.