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Re: [ATM] 40" mirror some ideas
Hello Thomas, the hole is a leftover from a previous
too deep center that was not completely corrected.
I parabolizes from here, as it was not deep.
Jean-Guy
----- Original Message -----
From: "Thomas" <tomjan@ozemail.com.au>
> Jean-Guy,
>
> Not a bad sphere at all! What caused the centeral hole?
>
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