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Hi Peter
It really depends on the quality of the components. If they are all a good `figure of revolution' then no issues. If there was any astigmatism in the components then they may have rotated them to cancel out and get the best wavefront.
There is also the possibility of the corrector plate having some astigmatism and maybe one other component to rotate and cancel. A lot to play with . My 1979 vintage C8 certainly had reference marks.
Don Whiteman did a Celestron maintenance course years ago -he might be the most qualified to help.
My memory of the old C14 was that it had pretty descent optics.
Hope this helps.
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