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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 :
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Did you see this ? 3D Printed Cyclone Separator - Building - Testing
If you are tired of knob making methods, this new method is for you. We make wooden knobs using a table saw, not a column drill. Watch the video for cute and useful knobs

In this video I am making a very useful tool for Spray Painting. A trigger handle that you can easily install and use of spray paints.