For switches, the plastic guarded style switches are just press fit into the holes. You just need leverage and maximum effort to take one out, and they go right back in. For the metal AV switches, Ultrasabers uses hot glue. The great thing about that is that you can heat it up to remove the switch. Use a heat gun on the metal around the switch (not the switch itself, I learned that the hard way) and go in sweeping circles around the switch until you feel the switch start to loosen. Once you've done your repair, you can heat the glue back up, put the switch back in and then set the hilt down with the switch down so that the glue will pool back around the switch and glue it back in. Alternately, if you don't want to do that to put the switch back in, some electrical tape on the threads will turn an AV switch into a press fit switch. I've been using that method for years and it works great. They're pretty easy to get back out for repairs but won't fall out.
points!