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I have a few question not about though this, on the 2012 cMBP are the fans asymmetrical like on the rMBP? Is it possible the mod those fans from the rMBP to cMBP?
 
I own a HP ProBook that has this setup and it is the absolute worst setup regarding ergonomics for a laptop. I am happy with the normal MacBook Pro setup and I wouldn't want to use mine any other way.

Don't worry. Apple doesn't make a 17" MacBook Pro anymore.
 
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