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I never liked laser collimators so I stick with some cardboard cutouts, a homemade colimation cap and a Cheshire collimator. For the cap, I got my focuser dust cap and did some geometry with a ruler and a compass that found the exact center and drilled a hole. If you are going to do this, use a hobby knife to put a guide hole in the center to stop your drill from slipping (like mine did). Please note that I only did this because I have 2 dust caps, one for my barlow and one for my telescope so when I stuffed up I had a spare.
Luke
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