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If you read about the technique of using a barlowed laser for collimation you will find a method that is completely accurate every time. There are several lower cost laser collimators that can be accurately calibrated themselves, the GSO being one. I have the GSO laser and it maintains a tight 1Cm spot circle over a target distance of six metres when rotated in the sight device. You don't need to spend heaps to get a good solution. Yes a Cheshire will do the job, as will a eyepiece cap with a hole, but you need to know what your doing and looking at.
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