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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
A great cordless vacuum cleaner made using the Angle Grinder. Whether you clean your workshop or your car. Do it easily.

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