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You can see how to easy build a simple dust collector in this video. I made a dust collector from two plastic buckets.
Making Video :
Go to this video's Youtube page and make a comment.
Did you see this ? 3D Printed Cyclone Separator - Building - Testing
My newly designed Circular Saw Guide. It turned out to be a simple and very useful circular saw guide.

This is the page that contains the desktop jointer's videos. You can view the 3D model video. You can download the PDF plan.