Chapel Perilous has taken its toll on me and indeed, my cosmic trigger finger is broken. For readers not familiar with Chapel Perilous I will give Robert Anton Wilson's definition of that god forsaken place. In researching occult conspiracies, one eventually faces a crossroad of mythic proportions (called Chapel Perilous in the trade).
Keep wood chisels razor sharp for building cabinet doors. A good set of chisels helps clean up and fine tune mortises and tenons or remove a bit of wood anywhere you need to, such as the ends of panel grooves in door frames. A chisel set and mallet are essential woodworking tools.
You don't need tools to release file cabinet doors from the cabinet. Do it with your fingers. Pull the drawer out of the cabinet until it stops. Place both hands on both sides of the drawer at the back where sides of the drawer runners connect to the sides of the cabinet.