I agree with CGRetired. if you are buying aftermarket servo arms get the ones made by Du-bro

Standard arms
http://www.advantagehobby.com/produc...t=0&page=1


heavy duty
http://www.advantagehobby.com/produc...t=0&page=1

For your plane the standard arms are more than enough. I listed the heavy duty arms simply for future reference.

Ken</p>