A quick comment perhaps not entirely relevant - carbon fibre is not an appropriate material for some scopes. For example refractors its a poor match and worse than aluminium alloy which closely matches the change in focus of an APO objective.
I am not sure about a Mak Cass, it does have a corrector plate.
Carbon fibre is certainly the go for mirrored scopes like RCs, CDks, Newts.
Greg.
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