Those brass inserts in the plastic case can be a pain. when the spin loose, the cover or whatever can be removed and the insert held with pliers to get the screw loose. Replacing the insert in the plastic with a little epoxy and added heat will get it remounted in the plastic. Often the plastic stud that holds the insert gets fractured and wont hold the insert anymore. Sometimes I've used scrap plastic and an old soldering iron to place the insert in place and remould the plastic around it. Usually just replace the whole plastic case piece.
What does the heat do to the epoxy that it doesn't do already without heat?
And if you remove the shell before removing that brass inserts, then aren't you pulling the brass inserts through the plastic shell?
I was thinking that is what I'll have to do, and I was thinking that to do it I'll need a clean penetration as it exits through the shell, so some kind of heating device to melt precisely around the screw and brass insert without cracking or augmenting the whole beyond what is necessary......would be nice.
So maybe some kind of steel tubing like maybe a broad syringe needle if they make them that broad heated by the solderer could reach around the diameter of the screw and brass insert on the other side, then seer through the plastic like butter knife.
Then take the putty epoxy, and fill in the hole. Sand off the outcrops and slag. Drill the new hole for the screw. Cover with liquid epoxy or superglue to give a sheen look, and fill the epoxy with the color of ink that matches the outer shell the best, so that the repair material matches as best as possible under glossy sheen.