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You should add that :
- primary is precision edge ground with zero wedge, and will never require collimation after it is factory assembled
- no tools of any kind are required for secondary collimation, just fingertips
- both primary and secondary are heated and can be kept dew free, greatly enhancing the longevity of coatings
- secondary focusing combined with ultra rigid back plate means no flexure/tilt whatsosever, even with heaviest cameras, off axis guiders, adaptive optics devices and filter wheels
and most importantly:
- guaranteed optical quality, with every unit tested via intereferometry as well as Roddier on real sky. No ifs, buts or excuses of any kind
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