I recently bought 4 a6060 spektrum servos. i installed them in my model tech magic and in my pre flight check the left aileron flutters. it moves up and down when i hold the stick in one spot. i was using an ar600 spektrum reciever and thought that my reciever was may be bad. i switched to my ar7000 and the rudder does the same thing. are these badservos or something else? any help would be awesome.</p>

Digital servos are over-zealous to hold their position by nature.
I've seen this happen with CA hinges and/or a little bit sloppy linkage.

Try putting a clothespin or just your finger's weight on the surface and if the shaking stops,
don't worry about it any more, it won't shake in the air. The load of air going over the surfaces will make it stop.

If the jittering continues with a load on the surface then get concerned.