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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
After watching this video, you can download the free PDF document and make it easily. There are many 90 degree corner clamp videos on youtube. But this is a little differ
Rotatable & Adjustable Wooden Smartphone Stand. You can rotate the phone 360°.