(very carefully)

Step 0
– read all these instructions before trying this yourself.
In particular, you can probably get away with removing the top cover only.

Step 1
– using a BLUNT object, such as a thin screwdriver, slide it along the gap between the “metal” top and white case “filler”.

(the observant amongst you lot will have noticed the bottom is already removed.  With the benefit of hindsight, I probably didn’t need to do that.)

Step 2
– Pry the case apart.

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