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Well with my telrad when I need to align it at the start of every viewing session. I usually find a probably really bright star in the eyepiece which is easy because my 7x50 usually fairly well aligned from the start. Then I turn the little 3 knobs until that bright star is in the centre of the 3 circles.
Collimating probably isn't the best word to describe the process. If you think the screws are too far in just unscrew them till you see movement. Less your telrad maybe broken.
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