Thanks for the observation. I will look for it if I use them.

The Futaba 9154's are working great on the ailerons of the Sickle, and for that matter the 9650's on elevators and 9156 on rudder are superb. No centering problems there!

The only wrinkle with the 9154's is the size, which as you know is slightly larger than most current "standard" servos and are thus more difficult to install. Because of this, I was not able to take full aerodynamic advantage of their recessed design as it would have meant removing too much material from the wings. Not bad at all, but just not completely optimum.