Jake, IMO there is no such thing as overkill on servos. Like Jimmy I have settled on using the Hitec 225mg on ailerons mainly because standard size servos won't fit and the 225 has enough power and speed for the small ailerons. The centering does have something to be desired but with the small throws it is noticable but not really an issue. For elevator I use a 5645MG on both airplanes as well. Yes it has way more power then needed but it has good centering. I beleive that is the key and most standard/sport servos are going to fall short here. On elevator you need a servo that centers well. I have gone as far as to consider installing a couple JR 8611 servos just to see if there is an improvement. I guess the bottom line is that with proper mechanical set up a 45 oz standard servo will work without failing but will it have enough holding power and center well enough? Remember, each time you apply a control it is like hitting the brakes. How much time will you loose if you have to input 6 corrections because your servo isn't centering?