That’s not entirely correct. If you skip the motherboard lifting steps, you’ll have to cut the plastic strips that keep the AirPort/BT cables in place, before you can deroute them (at least in my Mid-2011 Air). To deroute the cables you’ll also have to remove at least one motherboard screw, in order to slightly lift the area of the MoBo under which the AP/BT cables run.
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Here's a preview of what the graph will look like:
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