Update: The mirror arrived today: GSO 10" f/5 (34mm thick) already centre spotted and I like that they include the plastic raised mirror cover that rests on the bevel edge. The marks on the side are from the 'fingers' used to hold the mirror during machining and do not affect the mirror surface area or coating - they only involve the beveled edge. Now that the mirror is here I can start work on the carrier.
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