Nathan,
Good question about servos.
I recently returned to RC after more than 20 years away and so much has changed. We used to fly .60 size "pattern planes" and Quickie 500 racers with servos that were weaklings as compared to the torque ratings of modern servos. How did we ever get away with it? My suggestion would be to use your standard Futaba S3004 servos for throttle on your classic pattern planes, and any other planes you may build. For your control surfaces, a good choice would be the Futaba S3152 Servo Digital Standard Hi-Torque. SPECS: Speed: .22 sec/60° @ 4.8V, .18 sec/60° @ 6V Torque: 69 oz-in @ 4.8V, 87 oz-in @ 6V Tower has these now listed at $29.99 Those old Kraft servos I used years ago were priced at about $35. That would be more than 100 bucks in today's dollars.
Regards
JC