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I have one of these and replaced the secondary screws as they are too short to place the secondary square in the focuser. After that I loosened the screws holding the primary and viewing through a Cheshire eyepiece jiggled the primary holder to achieve collimation. Then I noted the position the retaining screw moved , removed the primary and filed them in the directions noted. Then after replacing the primary adjusted as before using the Cheshire , tightened the screws and wound some electrical tape around the primary holder/ optical tube connection to help maintain collimation. After this the views with a premium plossel were quite nice. However this is a low power scope ! A bigger scope might be better as many young people with an interest in astronomy can be put off by a cheap scope.
Philip
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