This otherwise fine and popular scope's weakest link is its focuser, I think.
After a lot of problems I decided to upgrade to a much better focuser from Baader Planetarium. I have documented the process in a video where I also show how you can align the focuser perfectly with the optical axis of the primary mirror. 
If you are interested you may find the video here: https://youtu.be/1logCewVcpI

Best regards,
Flemming
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