Rick, if you're still reading in on this the servos you have would be fine for a lot of 1/2A designs.

By now you might be figuring out that it's all about how fast the model is flying and how big the surfaces are and how far you want to move them. The servos you have would all be fine for any but the fastest models used with larger surfaces. Any of the casual flying around 1/2A stuff or equivalent 80 to 140 watt electric flying would be fine with them. Even a slower flying 2M glider with an .049 on the nose would be fine with the servos you show. The risk there would not be in the air but on the ground where a strike against the rudder on a polyhedral style glider would be inclined to snap the gear teeth. But in the air the small servos shown would be enough for even a slower flying "casual" 2m glider.

Or you could have some 4 channel fun with a 50 to 60 inch span 1/2A warm liner style glider where you put one of the small servos on each aileron with one each on the elevators and rudder.

There was also a category of old timer flying with 45 to 50 inch span lightly built "stick and film" or "stick and tissue" old timer gas models or the Spirite of SAM even for scaled up rubber models at around 40" span that fly quite slowly in a "parkflyer" style manner. The 1/2A Texaco event models would fly just fine with the servos you have there.

Hope that helps out. And sorry I'm late to the party.