seebart wrote: I´ll never get the mount out of there.
It’s pretty easy to remove.
2 ways:
(1) one get some kind of sharp metal hook or stick, jab it into the plastic of the keycap stem, and pry it up.
(2) open up the switch (use two tiny screwdrivers or similar to pry out on the plastic tabs and pull the top housing up), and poke the little plastic piece through from the other side of the slider.
I have never broken one of these myself in removing keycaps from 10+ old apple boards (what kind of method are you using to pull the keycaps off? there are good ways and bad ways), but a couple had caps already broken off like this when I got them, and removing them only takes a minute, and isn’t hard.