I haven't used it on side covers but I have used it on other irreplaceable plastic bits at work. It works very well, just apply your super crazy cyanoacrylate (sp?) Glue and sprinkle a little baking soda on the wet glue. The baking soda acts as a catalyst and will instantly harden the glue. Just a dusting will do, I suggest poking a tiny hole in one upper corner of the box and pouring a tiny stream of baking soda from there, that's all it takes. You can also use this technique to build up an area to add strength.