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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,167
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Yeah, the math has been done here before. (search)
The thermal expansion differences here - not rocket surgery. But, it is easier to tell people to wait overnight . . .just so they'll wait a hour after flogging the thing.
I'll say again, the gap tolerance is huge. .004" with +/- .002"
Or, you can make sure you find an air conditioned garage (68F) at sea level with 50% humidity, and then fret over getting them to .004 +/-.000 01 . ...after letting it sit over night, of course.
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Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong.
Disclaimer: the above was 2¢ worth.
More information is available as my professional opinion, which is provided for an exorbitant fee. 
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