The glue didn't want to let go, but we overpowered it with a flick of our magic wand. Screws would have been a lot easier to get apart (and much nicer to put back together).
There's not much Aluminum in the mouse, we weighed just 10 grams. That's compared to 37 grams of plastic and 47 grams of batteries. Nearly half the mouse's weight comes from the two AA batteries.