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Greg,
The setup has everything to do with it - but nothing unusual about a MMOAG not coming to focus !
You just need to make sure that the metalback distance from your focusser to the image plane (or field flattener in the case of some refractors if one is in use) of the optical path is the same for the CCD camera as it is to guide camera.
Work it out on paper first before buying or messing around with adapters and lenses.
The Tak 1.25" EP holders will actually screw into the MMOAG, thereby yielding a shorter path in lieu of the Oasis helical focusser supplier.
Cheers
Rally
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