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Back in the day I swapped the keys on my 12" powerbook keyboard around to read MACGENIUS
across the middle row.
I unearthed the picture, and figured, why not do it to my apple aluminium keyboard? So I found a tutorial from some other guy that'd done it, and dug out my penknife.
Also, I'd picked up some stickers at work and couldn't quite bring myself to deface the macbook with them, so one of them went on the back of the keyboard: