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Doug Miller
 
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In article , wrote:

If there's twist and one resurfaces one surface, then it's true one will
have destroyed the symmetry


Exactly. And that's why face jointing must precede planing.

but that's a different operation.


Yep. That's the operation that should be done *first*.

--
Regards,
Doug Miller (alphageek at milmac dot com)

Nobody ever left footprints in the sands of time by sitting on his butt.
And who wants to leave buttprints in the sands of time?