I'll agree that the S-3003/4 servos aren't what you need for planes larger than .60 size. In fact, on many .60 size planes using these servos for rudder isn't a good idea.

Typically, the rudder will have the highest load on the servo, especially when you are flying a taildragger with dual aileron servos. The tailwheel places more shock loads on the servo than a nsegear typically will. Spring loaded "servo savers" are highly recommended on nosewheels or a springy connection of tailwheel to rudder is a very good idea no matter what servo you use.

There is a difference between off-brand servos and relabeled name-brand... The Tower TS-53 is a relabeled Futaba. The GWS servos are not relabeled. (and they are getting pretty good....)

Also, some of the "off brand" servos are getting to be as good or better than some of the "major name brand" servos... HiTech for example used to be a low end off-brand maker of Futaba compatible servos. They have developed into a major name brand R/C equiment maker, with as good average quality as Futaba.

Yes, you do get better quality and precision by getting a higher priced servo in most cases. The Futaba 9000 series servos are worth the extra cost for thier improved precision and power. I know Competition Pattern fliers who will use nothing else.... Not much need for these in a trainer though.

Without knowing what was desired except some info on the S-3003/4.... Ithought that pointing out a cheaper way to get the same servo was a good idea.