1609=62.3g, 0606=22.7g, 0806=40g, total weight in my allure = 187.7g, that's less total servo weight than any other combo of servos I've used in the past. Add 10g to get to the 2211 with 19.3 kg-cm torque at 7.4v. Keep in mind that given the throw distance needed on the rudder you are going to have more than a 1cm control horn on the servo and the corresponding resulting loss of force to the rudder cable/control rod depending on your install. I think I have 1.5inches (3.8cm) from center to each rudder cable, so with the 1609's 13kg-cm we're talking about 3.4kg of effective force on a very large and not counter-balanced rudder. Again, note the %-age of available torque being used just to hold my Allure level through a 2 of 4 at 1:20 in my flight. Now, imagine asking that same rudder servo to hold through a KE loop!
Peter+