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Greg,
I think most imagers would only choose to get the FSQ106EDXIII by choice.
There is no Captains Wheel, just the CAA.
Many lock off the original focusser anyway and add an electronic focusser which solves that - this tends to be needed for heavy cameras simply because most (standard) motor drive units that drive the original focus shaft cannot reliably shift the focusser with big heavy camera loads at Zenith.
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