I've been holding off deconstructing and cleaning my NES Advantages for a couple of years. Why? It isn't from lack of knowing how to take them apart. Even if I didn't already know how to work on joysticks, there are at least 20 tutorials online detailing how to unscrew some screws, undo a couple washers and unscrew a joystick ball top.
What no one covers...and I kept hoping someone would, was re-applying the feet on the bottom. Is there anyone who has done a bunch of these that has a preferred glue type for reapplying those bottom rubber circles? Or is everyone playing with pad-less NES Advantages like a bunch of philistines?