Another method of dis-assembly: remove the pickguard screws (leaving pickup screws, pots and switch untouched).

Remove the jack plate, desolder or cut the output jack wires, flip over the guitar and desolder the ground wire on the tremolo. Remove the pickguard with all electronics attached.

This method gives easy access to do electronics repairs/mods, without having to readjust pickup heights and individual components won't move around when you're soldering.