How do I repair the upper case screw "bushings/barrels"?

I've tried Gorilla Glue super glue, but the torque applied by the screws is apparently too much for the glue. I was about to try Gorilla Glue epoxy which has a torque rating of 3300psi, but thought I'd seek any additional advice first.

Also, how do you remove the keyboard from the case to put into another case? It seems as though the keyboard is held in place by plastic pins that are melted into place. Any ideas?