I recall asking the same thing almost 10yrs ago when I realized that the adhesive in my laptops would always turn to goo over time. Several days ago I moved the feet that had visibly shifted out of place on my NES Advantage. I used a heat gun and it did not appear to go very well:
The grainy look underneath looked like adhesive stayed on the bottom plate and peeled off a layer of rubber, but the area still had significant overlap with the correct position so I just twisted them back where they belonged and stuck them back down. So far it is holding up.
I have taken apart other NES Advantage sticks before (there are a TON of completely different internal revisions) and had some where the rubber feet don't want to stick anymore. I'm all ears if anyone has a good suggestion that preserves the original feet.
The bigger issue for most people is having a nut driver with a hole in the driver shaft for the potentiometer shafts.
I'm also modding a bunch of Neo-Geo Gold X joysticks and those feet do not want to re-stick either.
