The clips that hold the top lid on can be VERY tricky to release if you don't understand how they work first time, once you have released one, the rest are easy! Spotting where you have to pry the clip from with a VERY thin flat head screwdriver from can be tricky because it is exactly the same color as the background and the gap you have to put the screwdriver into can be missed as a result. Don't try any other clips along the side until you have fully released and understood how the first one nearest the corner works.
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