Ryan,
while I have no experience with the Futaba Aileron servos. I have heard they are very good. All pots will wear. The Servo pots will wear much faster than the ones in the TX gimbals.

JR service can check you TX gimbals and replace them if the pots are worn. I would say that although we don't like to be away from our TX's for very long that they should go in for a checkup every couple of years. This does depend on how much you fly. I send my TX's in every other year. I have 2 of them and they get the sticks all calibrated and centered up and all the little wear and tear items taken care. If you have not sent it in in nearly 5 years its past due. I would still bet the servos are where the biggest problem is but you will probably see a difference if you transfer the model to a different 10X TX depending again on how much use it has.

Let me know if I can help further.
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Troy Newman
Team JR