Neat Way to Open Power Supply

Step 1: Tools

Hobby (wireman) Saw
Chisel
Hammer
Clamp or Vise

Step 2: Secure the P Supply

Use clamp or vise to hold p supply in position

Step 3: Break the "weld"

As most power supply are chemically bonded, use saw to remove material about 0.5 to 1 mm on the long sides which does not hv connectors

Step 4: Open It

Use chisel to crack and break remaining bond on the un-saw sides. Use chisel to pry and twist to neatly open it up

Step 5: Opened Case

Done. Isn't it neat?