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Hi Alex,
Polar aligment is not important, it's irrelevant. You can do this Alt-Az or even untracked, though at long focal length it'll move out of frame pretty quickly.
Can't answer the eyepiece projection question, never tried it. I try and keep as little glass between the object and the CCD, cheap glass doesn't work at high magnifications, and expensive glass is, well, expensive.
Cheers
Stuart
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