Tam, Mauri, do you think the DS3421 on rudder will be sufficient with nylon gears; thats my only worry about that servo. When I owned a Skymaster Hawk I used the nylon servo and it shreaded the gears from either flutter or break of former. The DS168 has metal gears but alittle less torque, and have heard them to be used in the F-18E's. I think I will do 2 DS8611 on the flaps since the price are the same as the 8411's. Thanks Tam, and Marui for the info...