Servos are pretty much terrible for anything except maybe driving the wheels on a very small robot, provided that robot is also equipped with encoders on the wh

Servos are pretty much terrible for anything except maybe driving the wheels on a very small robot, provided that robot is also equipped with encoders on the wheels. Basically you're just applying power to the motor for some time and hoping it turns the right amount; unlike say a stepper motor, you have no built-in guarantee of how far it'll turn. You can make up for that with the encoders, but the other big problem with servos is that they're not very strong... all the ones I've ever used have plastic gears inside which love to strip.