I also used the standard arms (the big one) that came with 8711 servos except for the rudder where I used the heavy-duty aluminium from Graupner with two socket-head screws. And I have a red tail so is just perfect
This is the model [link]http://shop.digitech-turbines.com/product_info.php?cPath=38_238_257&products_id=468& osCsid=l3q0b2vo2be7hm1b5a7g4sfo26[/link]

Alessandro