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I have been away on an instrument building course so I missed this.
Looks a lot neater than my old plumbing fitting and rough drill holes.
I am glad to works.
The instrument building workshop has shown me some techniques and tools could help me build a better version. I am working on a modification. A work in progress.
I have found with some filters such as UHC or Oiii I can not see the diffraction pattern clearly. I am not sure if any one else has this problem.
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